Ultrathin molybdenum boride films for highly efficient catalysis of the hydrogen evolution reaction

Wang, Xufeng; Tai, Guòan; Wu, Zenghui; Hu, Tingsong; Wang, Rui

doi:10.1039/c7ta08597d

Cited by 123 publications

(96 citation statements)

References 38 publications

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“…Wang et al used chemical vapor deposition to synthesize ultrathin Mo 3 B films on Mo foil. The boron source (mixture of boron and boron oxide powder) was kept at one end and the target (Mo foil) was kept at the other end of a CVD furnace and heated to high temperatures.…”

Section: Synthesis Routes To Obtain Metal Boridesmentioning

confidence: 99%

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

Gupta

Patel

Miotello

et al. 2019

Adv Funct Materials

335

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%

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

Gupta

Patel

Miotello

et al. 2019

Adv Funct Materials

335

243

View full text Add to dashboard Cite

show abstract

“…In the past few years, non‐noble‐metal‐based electrocatalysts such as phosphides, sulfides, nitrides, carbides, and metal alloys were shown to have outstanding electrocatalytic performance. Among these materials, transition‐metal borides such as MoB (bulk), FeB 2 (nanoscale), Co‐B (amorphous), Co‐Ni‐B (amorphous), Ni‐B (amorphous), Mo 3 B (film), MoAlB (bulk), and VB 2 (nanoscale) have drawn considerable attention recently owing to their low cost, excellent electrocatalytic activity, and stability both in acidic and/or basic solutions. Among these borides, those containing the flat graphene‐like boron layer, such as α‐MoB 2 , FeB 2 , and VB 2 , have the highest HER activity.…”

Section: Figurementioning

confidence: 99%

High‐Current‐Density HER Electrocatalysts: Graphene‐like Boron Layer and Tungsten as Key Ingredients in Metal Diborides

et al. 2019

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“…Very recently, Mo borides (MoB x ) was found as one alternative catalyst because they owns favorable metallic conductivity and good chemical durability . In 2012, Vrubel et al .…”

Section: Emerging Molybdenum‐based Electrocatalystsmentioning

confidence: 99%

The Holy Grail in Platinum‐Free Electrocatalytic Hydrogen Evolution: Molybdenum‐Based Catalysts and Recent Advances

Zhuang

Huang

et al. 2019

ChemElectroChem

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Electrochemical water splitting towards hydrogen production is of significance for our sustainable development in the future. Although platinum-group catalysts possess the highest activity for hydrogen evolution reaction (HER), their scarcity renders potential applications commercially inviable and thus many efforts are constantly devoted into this arena. Over the last decade, various molybdenum-based catalysts, covering, for example, sulfides, carbides, phosphides, borides, nitrides and alloys, have been found to be very active, and are rapidly becoming popular. In this Review, we comprehensively summarize this topic of emerging Mo-based catalysts for HER by stating and discussing their catalytic mechanisms, synthesis methods, optimization tactics, and promise to outbalance platinum-based systems. We use typical examples from recent advances of various Mo-based catalysts to elaborate their merits and shortcomings for HER, as well as how to further optimize their activities, varying from surface area maximization and active site exposure to electron/atom/molecule/phase-level manipulation, and to external field-assisted activity enhancement. We also propose various challenges and perspectives for these emerging Mo-based catalysts and discuss how these challenges might be addressed.

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Ultrathin molybdenum boride films for highly efficient catalysis of the hydrogen evolution reaction

Abstract: Ultrathin crystalline Mo3B films have been synthesized on molybdenum foils, exhibiting striking catalytic performance and fantastic cycling stability.

Cited by 123 publications

References 38 publications

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

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

High‐Current‐Density HER Electrocatalysts: Graphene‐like Boron Layer and Tungsten as Key Ingredients in Metal Diborides

The Holy Grail in Platinum‐Free Electrocatalytic Hydrogen Evolution: Molybdenum‐Based Catalysts and Recent Advances

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