Ultrathin Amorphous Iron–Nickel Boride Nanosheets for Highly Efficient Electrocatalytic Oxygen Production

Nsanzimana, Jean Marie Vianney; Reddu, Vikas; Peng, Yeucheng; Huang, Zhen‐Feng; Wang, Cheng; Wang, Xin

doi:10.1002/chem.201802092

Cited by 84 publications

(83 citation statements)

References 84 publications

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“…The OER performance of metal borides is also on par with other nonprecious metal electrocatalysts. It must be noted that Fe–Ni–B/NF catalyst could achieve a low overpotential of 237 mV with a moderate loading of 1.0 mg cm −2 , which reiterates the superior OER performance of metal borides in alkaline medium.…”

Section: Discussionmentioning

confidence: 58%

“…Increasing the amount of catalyst improves the number of active sites and hence the observed performance. In the context of metal borides/borates, some of the reports, especially involving porous substrates (examples discussed later) use a catalyst loading ranging from 1 mg cm −2 to excess of 10 mg cm −2 , which translates into much lower overpotentials (<200 mV for OER). However, such high catalyst loadings are not useful as they do not offer cost‐effective solutions when upscaled.…”

Section: Performance Evaluation and Related Discrepanciesmentioning

confidence: 99%

“…Co–B i /Graphene foam composite yields η 1 = 315 mV, which is lower compared to Co–B i /FTO, indicating the advantage of porous and conducting graphene foam. Bimetallic borides such as Fe–Ni–B and Ni–Co–B were also grown on Ni foam, which yielded nanosheet‐like ( Figure a) and nanocotton like (Figure b) morphologies respectively, facilitating water oxidation process. Sun and co‐workers used electrodeposition technique to synthesize Co–B i nanosheets array on Ti mesh substrate.…”

Section: Strategies Adopted To Enhance the Performance Of Metal Boridesmentioning

confidence: 99%

Section: Strategies Adopted To Enhance the Performance Of 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

311

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: Discussionmentioning

confidence: 58%

Section: Performance Evaluation and Related Discrepanciesmentioning

confidence: 99%

Section: Strategies Adopted To Enhance the Performance Of Metal Boridesmentioning

confidence: 99%

Section: Strategies Adopted To Enhance the Performance Of Metal Boridesmentioning

confidence: 99%

See 2 more Smart Citations

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

Gupta

Patel

Miotello

et al. 2019

Adv Funct Materials

311

243

View full text Add to dashboard Cite

show abstract

“…15 Only recently, metal boride catalysts have shown excellent electrochemical catalytic performances due to their fast kinetics and superior stability, stemming from the synergistic effect of in situ formed thin oxide, hydroxide or oxyhydroxide layer and boride core. 3,16,17 A Ni-B@NiO x H catalyst supported on nickel foam showed for instance 20 mA cm −2 at 0.28 V overpotential in 1.0 M KOH, which surpassed the activity of most previously reported nonprecious electrocatalysts for OER. 18 Within the core-shell catalysts, the surface shell functions as catalytic sites while the inner core facilitates charge transfer.…”

Section: Introductionmentioning

confidence: 83%