Co9S8 Nanosheet Coupled Cu2S Nanorod Heterostructure as Efficient Catalyst for Overall Water Splitting

Zang, Zehao; Wang, Xuewei; Li, Xiang; Zhao, Qingling; Li, Lanlan; Yang, Xiaojing; Yu, Xiaofei; Zhang, Xing Hua; Lu, Zunming

doi:10.1021/acsami.0c20820

Cited by 130 publications

(62 citation statements)

References 55 publications

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“…In Figure 4d, the excellent OWS performance of CLDH/CP/CF surpasses most heterogeneous bifunctional electrocatalysts reported recently. [ 33,34,36,41–49 ]…”

Section: Resultsmentioning

confidence: 99%

Assembly of Cobalt Layered Double Hydroxide on Cuprous Phosphide Nanowire with Strong Built‐In Potential for Accelerated Overall Water Splitting

Cao

You

et al. 2021

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evolution reaction (HER) and anodic oxygen evolution reaction (OER) require abundant, cheap, stable, and efficient electrocatalysts. In the past years, huge efforts have been devoted to the development of low-cost electrocatalysts based on transition metals. In general, transition metals, [4] and their nitrides, [5] phosphides, [6] and sulfides, [7] exhibit effective catalytic activity for HER in pH-universal electrolytes, while metallic oxides, [8] and hydroxides, [9] are predominantly alkaline OER electrocatalysts. Nevertheless, it is still difficult to integrate HER and OER in a common electrolyzer due to that most OER electrocatalysts are inactive or corroded in acid media. [10] In this regard, it is crucial to develop cost-effective bifunctional electrocatalysts toward both HER and OER in alkaline media. Up to date, numerous bifunctional electrocatalysts composed of two or more active components have been designed and prepared via interfacial engineering, such as metal-semiconductor Mott-Schottky heterojunctions, [11] heterogeneous sulfides, [12] and phosphides hybrids. [13] These heterogeneous electrocatalysts usually possess the advantages of each component and exhibit vastly improved electrocatalytic performance because of the modified electronic structure in the vicinity of interfaces.Whereas, how to design and synthesize heterogeneous bifunctional electrocatalysts is still lacking systematic reports. Recently, it has been demonstrated that n-type semiconductor catalysts favor cathodic HER and p-type ones prefer anodic OER. [14] On account of this view, it is envisaged that integrating an n-type semiconductor and a p-type one would bring about bifunctional HER and OER electrocatalyst. As is well known, upon intimate contact of p-type and n-type semiconductors to form p-n junction, their Fermi levels turn to be aligned, leading to the formation of the opposite space-charge region at the interface. [15] This changed electronic structure has a great influence on the absorption of target ions and the charge transfer during electrochemical reactions. [16] Specifically, the positively charged n-type side is in favor of the absorption of OH − ions to facilitate OER. [17] Though it has been concluded that the enriched electron density on a metal surface could lead to the stabilization of adsorbed hydrogen for enhanced HER, [18] how the negatively charged p-type side affects HER is still unknown. Heterostructure plays an important role in boostingthe overall water splitting (OWS) performance of nonprecious metal electrocatalysts. However, rational design and synthesis of semiconductor heterojunctions especially for Cu-based ones as efficient bifunctional electrocatalysts toward hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) still face challenges, and the in-depth study of catalytic mechanisms is urgently needed. Herein, n-type cobalt layered double hydroxide nanosheets are assembled on p-type cuprous phosphide nanowire to form p-n junction. This heterostructure with a strong built-in potent...

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“…In Figure 4d, the excellent OWS performance of CLDH/CP/CF surpasses most heterogeneous bifunctional electrocatalysts reported recently. [ 33,34,36,41–49 ]…”

Section: Resultsmentioning

confidence: 99%

Assembly of Cobalt Layered Double Hydroxide on Cuprous Phosphide Nanowire with Strong Built‐In Potential for Accelerated Overall Water Splitting

Cao

You

et al. 2021

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“…[37][38][39] It is reported that S optimizes the free energy of H* (DEH*) adsorption of CuO, and the O site of CuO near the Sdoped site increased the H adsorption capacity. 40 Fig. 4…”

Section: Resultsmentioning

confidence: 99%

Novel heterostructure Cu₂S/Ni₃S₂ coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media

Peng

2021

RSC Adv.

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“…[ 375 ] In addition, the heterostructure catalyst of 2D nanosheets of Co 9 S 8 /1D nanorod of Cu 2 S on Cu foam (Co 9 S 8 /Cu 2 S/CF) required a low HER and OER overpotentials of 165 mV and 195 mV to reach 10 mA cm –2 , respectively. [ 376 ] As a bi‐functional water splitting electrode, it requires 1.6 V at 10 mA cm –2 .…”

Section: Hydrogen Evolution (Her) and Oxygen Evolution Reactions (Oer...mentioning

confidence: 99%

Developments and Perspectives on Robust Nano‐ and Microstructured Binder‐Free Electrodes for Bifunctional Water Electrolysis and Beyond

Chandrasekaran

Khandelwal

Fan

et al. 2022

Advanced Energy Materials

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Ni, Fe, and Cu foams to form robust binder-free electrodes for high-performance electrocatalytic reactions. [55][56][57][58][59] Interestingly, multidimensional electrocatalysts grown at the nanoscale on a range of current collectors, namely substrates and will benefit from a strong adhesion with the current collector to avoid catalyst delamination, limited active sites, and charge transfer blockage to enhance catalytic reactions (Figure 1b-d). [9,[60][61][62][63][64] Key Prospects, Insights, and the Dynamic Properties of Nano-and Microstructured Binder-Free Electrocatalysts and Their Direct Impact on Electrochemical ReactionsWater splitting has become one of the most important technologies to produce hydrogen (H 2 ) in high purity form. Water splitting includes two half-reactions, namely the cathodic HER and anodic OER. [8,65] Generally, the electrocatalytic performance and activity are highly sensitive to local reaction conditions and is largely valued by the energy required for adsorption/desorption of reaction intermediates and the rupture/creation of chemical bonds. Hence, the conventional powder form of precious metals such as Pt/C for the HER and RuO 2 or IrO 2 for the OER are considered ideal electrocatalysts. [66] In addition, several nonprecious 1D, 2D, and 3D nano-and microstructured powder catalysts such as MoS 2 , WS 2 , Ni 3 S 2 , NiCo 2 S 4 are also of interest for the HER and OER reactions. [54,[67][68][69][70][71][72][73][74] However, for commercial purposes and practical applica-

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Co₉S₈ Nanosheet Coupled Cu₂S Nanorod Heterostructure as Efficient Catalyst for Overall Water Splitting

Cited by 130 publications

References 55 publications

Assembly of Cobalt Layered Double Hydroxide on Cuprous Phosphide Nanowire with Strong Built‐In Potential for Accelerated Overall Water Splitting

Assembly of Cobalt Layered Double Hydroxide on Cuprous Phosphide Nanowire with Strong Built‐In Potential for Accelerated Overall Water Splitting

Novel heterostructure Cu₂S/Ni₃S₂ coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media

Developments and Perspectives on Robust Nano‐ and Microstructured Binder‐Free Electrodes for Bifunctional Water Electrolysis and Beyond

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Co9S8 Nanosheet Coupled Cu2S Nanorod Heterostructure as Efficient Catalyst for Overall Water Splitting

Cited by 130 publications

References 55 publications

Assembly of Cobalt Layered Double Hydroxide on Cuprous Phosphide Nanowire with Strong Built‐In Potential for Accelerated Overall Water Splitting

Assembly of Cobalt Layered Double Hydroxide on Cuprous Phosphide Nanowire with Strong Built‐In Potential for Accelerated Overall Water Splitting

Novel heterostructure Cu2S/Ni3S2 coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media

Developments and Perspectives on Robust Nano‐ and Microstructured Binder‐Free Electrodes for Bifunctional Water Electrolysis and Beyond

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Co₉S₈ Nanosheet Coupled Cu₂S Nanorod Heterostructure as Efficient Catalyst for Overall Water Splitting

Novel heterostructure Cu₂S/Ni₃S₂ coral-like nanoarrays on Ni foam to enhance hydrogen evolution reaction in alkaline media