Cobalt‐Tungsten‐Boron as an Active Electrocatalyst for Water Electrolysis

Cao, Guoxuan; Xu, Ning; Chen, Zhengjun; Kang, Qing; Dai, Hongzhe; Wang, Ping

doi:10.1002/slct.201701459

Cited by 41 publications

(36 citation statements)

References 62 publications

(89 reference statements)

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“…By donating electrons, B may play a sacrificial role to prevent the oxidation of the metal sites and improve their stability. A number of reports on amorphous Co and Ni based borides agree well with this reverse electron transfer phenomenon being responsible for higher HER rate …”

Section: Origin Of Electrochemical Activity In Metal Boridessupporting

confidence: 55%

“…The electrocatalytic performance of mono‐metal borides improve drastically after incorporation of a second element (examples discussed later) . While most reports just summarize the performance chart, only few of them tried to understand the role of these secondary elements in improving the HER rates.…”

Section: Origin Of Electrochemical Activity In Metal Boridesmentioning

confidence: 99%

“…The interaction between Co and H is too strong in Co–P, but in Co–P–B, the bonding is optimized owing to the transfer of electrons from B to Co, thereby increasing HER activity. Apart from these elements, HER activity of many other ternary catalysts has been reported, but no efforts were taken to understand the role of incorporated metals.…”

Section: Origin Of Electrochemical Activity In Metal Boridesmentioning

confidence: 99%

“…When tested in 1 m KOH, Co–B/Ni foam showed η 10 = 110 and 315 mV, for HER and OER, respectively. Wang and co‐workers deposited Co–W–B on Ni foam and calcined at different temperatures to obtain a layered morphology consisting of polycrystalline phases of Co(OH) 2 , CoO, and Co 3 O 4 . Nocera and co‐workers tested Co–B i on a larger scale by electrodepositing it on a porous Ni foam and fluorine‐tin oxide (FTO) coated glass.…”

Section: Strategies Adopted To Enhance the Performance Of Metal Boridesmentioning

confidence: 99%

“…Hence, majority of the present day electroless deposition procedures employ NaBH 4 as the reducing agent. 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.…”

Section: Synthesis Routes To Obtain Metal Boridesmentioning

confidence: 99%

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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: Origin Of Electrochemical Activity In Metal Boridessupporting

confidence: 55%

Section: Origin Of Electrochemical Activity In Metal Boridesmentioning

confidence: 99%

Section: Origin Of Electrochemical Activity In Metal Boridesmentioning

confidence: 99%

Section: Strategies Adopted To Enhance the Performance Of Metal Boridesmentioning

confidence: 99%

Section: Synthesis Routes To Obtain Metal Boridesmentioning

confidence: 99%

See 3 more Smart Citations

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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Surface‐Activated Amorphous Iron Borides (Fe_xB) as Efficient Electrocatalysts for Oxygen Evolution Reaction

Wang

Zhao

et al. 2019

Adv Materials Inter

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The development of efficient and earth‐abundant water‐splitting electrocatalysts is of great importance for energy conversion and storage technologies. In this study, surface‐activated amorphous FexB catalysts, Fe–B–O@Fe2B and Fe–B–O@FeB2, are synthesized and remarkable activity for the oxygen evolution reaction (OER) is achieved, e.g., Fe–B–O@FeB2 delivering a current density of 10 mA cm−2 at overpotential of 260 mV with Tafel slope of 57.9 mV dec−1 for OER in alkaline electrolyte. Iron oxide/hydroxide and oxidized borate species on the surface of FexB are found to have a synergistic effect on promoting the OER activity of the sample. Moreover, it is found that the OER active oxidization layer of iron boride is less active toward hydrogen evolution reaction.

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Electroless Plating of Transition Metal Boride with High Boron Content as Superior HER Electrocatalyst

et al. 2020

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Facile deposition of transition metal boride (TMB) with high‐boron content as highly efficient hydrogen evolution reaction (HER) electrocatalyst has been realized by a facile one‐step electroless‐plating (EP) method. Boron content of the TMB catalyst shows an appreciable impact on its intrinsic HER activity. NiB/NF electrode with thin amorphous nickel boride (NiB) deposition on nickel foam (NF) required overpotential of only 41.2 mV to deliver a current density of 10 mA cm−2 for HER in 1.0 M KOH alkaline electrolyte. Meanwhile, this kind of electrode also shows satisfied stability which can work at large current density of 1000 mA cm−2 for over 72 h without performance degradation. The advance on the TMB electrode may pave a way to the development of practical electrodes for water splitting.

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Cobalt‐Tungsten‐Boron as an Active Electrocatalyst for Water Electrolysis

Cited by 41 publications

References 62 publications

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

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

Surface‐Activated Amorphous Iron Borides (Fe_xB) as Efficient Electrocatalysts for Oxygen Evolution Reaction

Electroless Plating of Transition Metal Boride with High Boron Content as Superior HER Electrocatalyst

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Cobalt‐Tungsten‐Boron as an Active Electrocatalyst for Water Electrolysis

Cited by 41 publications

References 62 publications

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

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

Surface‐Activated Amorphous Iron Borides (FexB) as Efficient Electrocatalysts for Oxygen Evolution Reaction

Electroless Plating of Transition Metal Boride with High Boron Content as Superior HER Electrocatalyst

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About

Surface‐Activated Amorphous Iron Borides (Fe_xB) as Efficient Electrocatalysts for Oxygen Evolution Reaction