Nanostructured Amorphous Nickel Boride for High‐Efficiency Electrocatalytic Hydrogen Evolution over a Broad pH Range

Zeng, Min; Wang, Hao; Zhao, Chong; Wei, Jiake; Qi, Kangcheng; Wang, Wenlong; Bai, Xuedong

doi:10.1002/cctc.201501221

Cited by 79 publications

(52 citation statements)

References 45 publications

(17 reference statements)

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“…A detailed study of the factors affecting the rate of electroless deposition in a Ni bath can be found in the report by Hwang and Lo Using this method, the two most prevalent binary borides—Ni–B and Co–B were deposited by various groups for electrolytic water‐splitting . Amorphous Ni–B was grown directly on glassy carbon electrode by Zeng et al One of the main steps in electroless deposition is the activation of the substrate. In this report, glassy carbon (GC) was activated by applying an anodizing potential of 2.0 V versus Ag/AgCl in a phosphate buffer.…”

Section: Synthesis Routes To Obtain Metal Boridesmentioning

confidence: 99%

“…Later, the groups of Hu and Patel reported development of Mo boride and Co boride, respectively, for electrocatalytic water splitting. Following these reports, transition‐metal borides/borates were developed using various techniques and were used extensively for water‐splitting reactions, in different pH solutions. Here, we would like to inform the readers that usually boron‐based catalysts that are developed in situ using electrodeposition are referred to as “borates” (denoted as M–B i , M = metal) while those catalysts prepared by any other technique are referred to as “borides” (denoted as M–B).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Metal Boride‐Based Catalysts for Electrochemical Water‐Splitting: A Review

Gupta

Patel

Miotello

et al. 2019

Adv Funct Materials

320

243

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Electrocatalytic water-splitting has gained a firm hold in the area of renewable hydrogen production owing to its integrative compatibility with intermittent energy sources. However, wide-scale implementation of this technology demands discovery of new electrode materials that strike a good balance between efficiency, stability, and cost. In the pool of inexpensive electrodes capable of catalyzing hydrogen and oxygen evolution reactions, metal borides/ borates have made a big splash in the last decade. However, the research in this family of electrocatalysts remains unorganized owing to the diversity of reports. This review summarizes the past and present research progress in metal borides/borates for electrocatalytic water-splitting. The fundamental reasons for electrochemical behavior in different metal borides/borates are highlighted here, also including some comments regarding erroneous practices in the performance evaluation of metal borides/borates. Various strategies used to enhance the electrocatalytic performance of metal borides/borates are discussed in detail. Different methods evolved over the years for the synthesis of metal borides/ borates are also discussed. Finally, an assessment of the commercial viability of metal borides/borates is made and future research directions are suggested. multimetal oxides, [18,19] layered double hydroxides, [20] oxyhydroxides, [21] and perovskites. [13,18] In addition to these, there has been the family of transition-metal borides/borates that have garnered enormous interest in the recent past. Though transition-metal borides (TMBs) have been used for water electrolysis since many decades, they were not really seen as potential candidates to replace noble metal catalysts, until recently. Indeed, in 2009, the group of Daniel Nocera reported in situ formed Co [22] and Ni [23] borates as analogous catalysts to Co phosphate, [24] for near-neutral water-splitting. Later, the groups of Hu [25] and Patel [26] reported development of Mo boride and Co boride, respectively, for electrocatalytic water splitting. Following these reports, transition-metal borides/ borates [27][28][29][30][31][32] were developed using various techniques and were used extensively for water-splitting reactions, in different pH solutions. Here, we would like to inform the readers that usually boron-based catalysts that are developed in situ using electrodeposition are referred to as "borates" (denoted as M-B i , M = metal) while those catalysts prepared by any other technique are referred to as "borides" (denoted as M-B). Over the past 5-6 years, a lot of studies have been carried out on borides/borates with remarkable results, presenting new possibilities in search for non-noble electrocatalysts. The electrochemical performance, stability and other important properties of all the metal borides reported so far are enlisted in Table 1 while that of metal borates are listed in Table 2. However, there are a lot of aspects that are not yet understood completely about borides/borates. For instance, the o...

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Section: Synthesis Routes To Obtain Metal Boridesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Metal Boride‐Based Catalysts for Electrochemical Water‐Splitting: A Review

Gupta

Patel

Miotello

et al. 2019

Adv Funct Materials

320

243

View full text Add to dashboard Cite

show abstract

“…Hydrogen-evolution reaction (HER) has generated significant interest as a promising technology for efficient renewable energy conversion [1][2][3][4][5][6]. Currently, the most efficient catalysts for HER, in addition to Pt, are earth-abundant metals, such as transition-metal sulfides [7][8][9], carbides [10][11][12], phosphides [13][14][15], and borides [16][17][18], which can replace noble metals.…”

Section: Introductionmentioning

confidence: 99%

Biopolymer-Inspired N-Doped Nanocarbon Using Carbonized Polydopamine: A High-Performance Electrocatalyst for Hydrogen-Evolution Reaction

2020

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Hydrogen-evolution reaction (HER) is a promising technology for renewable energy conversion and storage. Electrochemical HER can provide a cost-effective method for the clean production of hydrogen. In this study, a biomimetic eco-friendly approach to fabricate nitrogen-doped carbon nanosheets, exhibiting a high HER performance, and using a carbonized polydopamine (C-PDA), is described. As a biopolymer, polydopamine (PDA) exhibits high biocompatibility and can be easily obtained by an environmentally benign green synthesis with dopamine. Inspired by the polymerization of dopamine, we have devised the facile synthesis of nitrogen-doped nanocarbons using a carbonized polydopamine for the HER in acidic media. The N-doped nanocarbons exhibit excellent performance for H 2 generation. The required overpotential at 5 mA/cm 2 is 130 mV, and the Tafel slope is 45 mV/decade. Experimental characterizations confirm that the excellent performance of the N-doped nanocarbons can be attributed to the multisite nitrogen doping, while theoretical computations indicate the promotion effect of tertiary/aromatic nitrogen doping in enhancing the spin density of the doped samples and consequently in forming highly electroactive sites for HER applications.Polymers 2020, 12, 912 2 of 12 candidates has not been reported to date. Clearly, the HER performance of carbon materials is not comparable to that of metal-based catalysts and does not presently conform to the benchmarks [31,35] established by metal-based catalysts. In addition, previously reported carbon-based electrocatalysts still exhibit several limitations during the synthesis process. For example, the synthesis of CVD-graphene-based catalysts is significantly expensive and requires multiple gas sources with particular pressure control and multiple transfer processes after the synthesis [34]. (Reduced) graphene oxide-based catalysts are a satisfactory alternative to CVD-graphene-based catalysts; however, their synthesis is time-consuming, toxic, and highly exothermal [36,37]. Furthermore, carbon sources exert a significant influence on the preparation process and the (electro)chemical properties of the resultant electrocatalyst. Among the potential candidates, polydopamine (PDA) has emerged as a new carbon precursor in recent years [28,[38][39][40][41]. PDA is the self-polymerized product of dopamine, which can be synthesized under mild aqueous conditions simulating marine conditions. Due to the presence of catechol groups, the resultant PDA exhibits strong adhesion to bulk substrates or organic and inorganic materials. Therefore, the PDA does not only serve as the functional layer for many applications [42][43][44] but is also a promising carbon source for the preparation of carbon-based materials. So far, although the structure of the PDA is still under debate, carbonized PDA (C-PDA) has been utilized as nitrogen-doped graphite [40,42].In this study, we demonstrate that through a variety of chemical doping processes-active sites for the HER-can be generated in the C-PDA. Furthe...

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“…Inorganic materials based on transition metal sulfides [34], phosphides [35], carbides [36] or borides [37,38] have been shown to have electro-catalytic efficiencies that begin to be competitive with platinum. The family of materials that has been most widely studied is transition metal sulfides, possibly because of their long time use as catalysts in oil desulfurization processes [39].…”

Section: Studies Of Transition Metal Sulfide Her Catalysts Using Mmentioning

confidence: 99%

In situ/Operando studies of electrocatalysts using hard X-ray spectroscopy

Lassalle‐Kaiser

Gul

Kern

et al. 2017

Journal of Electron Spectroscopy and Related Phenomena

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This review focuses on the use of X-ray absorption and emission spectroscopy techniques using hard X-rays to study electrocatalysts under in situ/operando conditions. We describe the importance and the versatility of methods in the study of electrodes in contact with the electrolytes, when being cycled through the catalytic potentials during the progress of the oxygen-evolution, oxygen reduction and hydrogen evolution reactions. The catalytic oxygen evolution reaction is illustrated with examples using Co, Ni and Mn oxides, and Mo and Co sulfides are used as an example for the hydrogen evolution reaction. A bimetallic, bifunctional oxygen evolving and oxygen reducing Ni/Mn oxide is also presented. The various advantages and constraints in the use of these techniques and the future outlook are discussed.

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Nanostructured Amorphous Nickel Boride for High‐Efficiency Electrocatalytic Hydrogen Evolution over a Broad pH Range

Cited by 79 publications

References 45 publications

Metal Boride‐Based Catalysts for Electrochemical Water‐Splitting: A Review

Metal Boride‐Based Catalysts for Electrochemical Water‐Splitting: A Review

Biopolymer-Inspired N-Doped Nanocarbon Using Carbonized Polydopamine: A High-Performance Electrocatalyst for Hydrogen-Evolution Reaction

In situ/Operando studies of electrocatalysts using hard X-ray spectroscopy

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