Co(OH)2 promoting the catalytic activity of CoP/Ni2P heterojunction for hydrogen evolution in both alkaline and acid media

Xing, Minghui; Liu, Huibing; Dong, Xiaobin; Liang, Ziheng; Huang, Shiqing; Ding, Xiangdong; Liu, Yang; Liu, Zhiping; Wang, Shitao; Cao, Dapeng

doi:10.1016/j.mtener.2022.101142

Cited by 12 publications

(6 citation statements)

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“…[47] The newly formed Co(OH) 2 could help promote water adsorption and dissociation. [17,48,49] Considering the outstanding catalytic activity of the Mo-RuCoO x nanarrays for both OER and HER in 1 m KOH aqueous solutions, an alkaline electrolyzer by using the Mo-RuCoO x as both anode and cathode in the two-electrode system was assembled for overall water splitting. As shown in Figure 6a, the Mo-RuCoO x couple well outperformed RuCoO x and RuO 2 (+)|| Pt/C (−) couples, exhibiting an outstanding overall watersplitting performance with a cell voltage of 1.457 V at the current density of 10 mA cm −2 , considerably lower than those for RuCoO x (1.483 V), RuO 2 (+)|| Pt/C (−) (1.580 V) (Figure 6b).…”

Section: Resultsmentioning

confidence: 99%

“…[ 47 ] The newly formed Co(OH) 2 could help promote water adsorption and dissociation. [ 17,48,49 ] While the real active sites were ascribed to the Co and Ru sites in the Mo–RuCoO x , the Mo doping greatly enhanced the HER activity of the Ru sites and the O V generation during the Mo dissolution further promoted the activity of the Co sites, thus considerably facilitating the HER kinetics. On the other hand, during the OER activation, the in situ converted amorphous Ru–CoOOH with O V during the Mo dissolution effectively regulated the electronic structure of the catalyst, which optimized the d‐band center and the adsorption of O‐containing intermediates, resulting in significantly enhanced OER catalytic activity.…”

Section: Resultsmentioning

confidence: 99%

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Electronic and Vacancy Engineering of Mo–RuCoO_x Nanoarrays for High‐Efficiency Water Splitting

Zhang

Wang

et al. 2023

Adv Funct Materials

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Exploring efficient strategies to achieve novel high‐efficiency catalysts for water splitting is of great significance to develop hydrogen energy technology. Herein, unique molybdenum (Mo)‐doped ruthenium–cobalt oxide (Mo–RuCoOx) nanosheet arrays are prepared as a high‐performance bifunctional electrocatalyst toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) through combining electronic and vacancy engineering. Theoretical calculations and experimental results reveal that the incorporation of Ru and Mo can effectively tune the electronic structure, and the controllable Mo dissolution coupling with the oxygen vacancy generation during surface reconstruction is able to optimize the adsorption energy of hydrogen/oxygen intermediates, thus greatly accelerating the kinetics for both HER and OER. As a result, the Mo–RuCoOx nanoarrays exhibit remarkably low overpotentials of 41 and 156 mV at 10 mA cm−2 for HER and OER in 1 m KOH, respectively. Furthermore, the two‐electrode electrolyzer assembled by the Mo–RuCoOx nanoarrays requires a cell voltage as low as 1.457 V to achieve 10 mA cm−2 for alkaline overall water splitting. This work holds great promise to develop novel and highly active electrocatalysts for future energy conversion applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Electronic and Vacancy Engineering of Mo–RuCoO_x Nanoarrays for High‐Efficiency Water Splitting

Zhang

Wang

et al. 2023

Adv Funct Materials

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“…5a. 95 The results indicated that Co(OH) 2 phases play a crucial role in breaking the H−OH bond to create H* on the surface of the catalyst in the base solution, whereas CoP/Ni 2 P components are the main active centers for adsorbing and desorbing of H atoms. As a result, CoP/Ni 2 P@Co(OH) 2 material displayed an outstanding HER efficiency with a small potential of −39 mV (at 10 mA cm −2 ) and a low Tafel slope of 55 mV dec −1 .…”

Section: Synthesis Of Nickel Phosphidesmentioning

confidence: 96%

Review—Recent Advances in Nickel Phosphide-Based Heterostructures for Electrochemical Hydrogen Evolution Reaction

Do,

Tran,

Truong

et al. 2024

J. Electrochem. Soc.

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The advancement of cost-effective and ultra-stable hydrogen evolution reaction (HER) electrocatalysts is critical in addressing carbon dioxide emission challenges. Because of their promising catalytic properties, their excellent stability, and their diversity in phases, nickel phosphide-based nanomaterials are viewed as prospective candidates for HER. This review begins with an examination of nickel phosphide synthetic routes, including vapor−solid reaction, solution−phase, and electrochemical deposition. Next, the process of hydrogen generation from water electrolysis was comprehensively explained, and various hetero-nanostructures, including nickel phosphides/-metal phosphides, -metal hydr(oxides), and the other materials for HER are shown. Finally, existing challenges and feasible advice for the progress of nickel phosphide-based electrocatalysts for hydrogen generation were highlighted.

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“…There are examples of TMP- and TMT-based materials that showed outstanding performance related to HER activity in both acidic and alkaline media; some examples are mentioned here: Co 2 P@Cu nanostructure [ 56 ], Co 2 P/Ni 2 P/CNT [ 57 ], FeNiP/MoO x /NiMoO 4 /NF [ 58 ], Ni 2 P@NC/NF [ 59 ], MoP-Ru 2 P/NPC [ 60 ], CoTe 2 /Ti 3 C 2 T x [ 61 ], NiFe 2 O 4 /NiTe [ 62 ], NiTe-HfTe 2 /g-C 3 N 4 [ 63 ], Co,Ni-MoTe 2 [ 64 ], and CoP/Ni 2 P@Co(OH) 2 [ 65 ] ( Table 1 ).…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Transition Metal Tellurides (TMTs) and Phosphides (TMPs) for Hydrogen Evolution Electrocatalysis

et al. 2023

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The hydrogen evolution reaction (HER) is a developing and promising technology to deliver clean energy using renewable sources. Presently, electrocatalytic water (H2O) splitting is one of the low-cost, affordable, and reliable industrial-scale effective hydrogen (H2) production methods. Nevertheless, the most active platinum (Pt) metal-based catalysts for the HER are subject to high cost and substandard stability. Therefore, a highly efficient, low-cost, and stable HER electrocatalyst is urgently desired to substitute Pt-based catalysts. Due to their low cost, outstanding stability, low overpotential, strong electronic interactions, excellent conductivity, more active sites, and abundance, transition metal tellurides (TMTs) and transition metal phosphides (TMPs) have emerged as promising electrocatalysts. This brief review focuses on the progress made over the past decade in the use of TMTs and TMPs for efficient green hydrogen production. Combining experimental and theoretical results, a detailed summary of their development is described. This review article aspires to provide the state-of-the-art guidelines and strategies for the design and development of new highly performing electrocatalysts for the upcoming energy conversion and storage electrochemical technologies.

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Co(OH)2 promoting the catalytic activity of CoP/Ni2P heterojunction for hydrogen evolution in both alkaline and acid media

Cited by 12 publications

References 50 publications

Electronic and Vacancy Engineering of Mo–RuCoO_x Nanoarrays for High‐Efficiency Water Splitting

Electronic and Vacancy Engineering of Mo–RuCoO_x Nanoarrays for High‐Efficiency Water Splitting

Review—Recent Advances in Nickel Phosphide-Based Heterostructures for Electrochemical Hydrogen Evolution Reaction

Recent Advances in Transition Metal Tellurides (TMTs) and Phosphides (TMPs) for Hydrogen Evolution Electrocatalysis

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Co(OH)2 promoting the catalytic activity of CoP/Ni2P heterojunction for hydrogen evolution in both alkaline and acid media

Cited by 12 publications

References 50 publications

Electronic and Vacancy Engineering of Mo–RuCoOx Nanoarrays for High‐Efficiency Water Splitting

Electronic and Vacancy Engineering of Mo–RuCoOx Nanoarrays for High‐Efficiency Water Splitting

Review—Recent Advances in Nickel Phosphide-Based Heterostructures for Electrochemical Hydrogen Evolution Reaction

Recent Advances in Transition Metal Tellurides (TMTs) and Phosphides (TMPs) for Hydrogen Evolution Electrocatalysis

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Electronic and Vacancy Engineering of Mo–RuCoO_x Nanoarrays for High‐Efficiency Water Splitting

Electronic and Vacancy Engineering of Mo–RuCoO_x Nanoarrays for High‐Efficiency Water Splitting