Bifunctional o-CoSe2/c-CoSe2/MoSe2 heterostructures for enhanced electrocatalytic and photoelectrochemical hydrogen evolution reaction

Ji，Y.1; Luo，W.1; Liu，Y.1; He，Z.1; Cheng，N.2; Zhang，Z.4; Qi，X.1; Zhong，J.1; Ren，L.3

2022-03-01

10.1016/j.mtchem.2021.100724

Materials Today Chemistry   影响因子和分区

2468-5194

The bottleneck of alkaline hydrogen evolution reaction lies in the kinetically sluggish brought from multistep reaction processes involving water adsorption and dissociation, as well as hydrogen adsorption. In this work, we successfully synthesized o-CoSe/c-CoSe heterostructures anchored on MoSe nanosheets to powerfully promote reaction processes. As an electrocatalyst, it exhibits a low overpotential of 112 mV at 10 mA/cm and a Tafel slope of 96.9 mV/dec for an alkaline hydrogen evolution reaction. Moreover, the as-prepared catalyst can behave as both cathode and anode for overall water splitting, which only requires 1.61 V cell voltage at 10 mA/cm. Significantly, the cell voltage can be further reduced to 1.53 V at 10 mA/cm for water electrolysis under the simulated solar irradiation owing to such a semiconductor-based heterostructure that facilitates the separation of photogenerated charges. Here, the improving overall performance of this ternary electrocatalyst is attributed to the multifunctionality and synergistic interaction of different components in this heterogeneous material. The work provides a novel strategy to design active catalysts simultaneously using electric energy and solar energy for effective water splitting.

Alkaline hydrogen evolution Photoelectrochemical water splitting Ternary hybrids Transition-metal dichalcogenides

EI

英语

其他

20215311410051

Electrocatalysts ; Electrodes ; Gas adsorption ; Heterojunctions ; Hydrogen ; Molybdenum compounds ; Selenium compounds ; Solar energy ; Solar power generation

Metallurgy and Metallography:531 ; Solar Power:615.2 ; Solar Energy and Phenomena:657.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Operations:802.3 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804

2-s2.0-85121869416

Scopus

1.Hunan Key Laboratory of Micro-Nano Energy Materials and Devices,Laboratory for Quantum Engineering and Micro-Nano Energy Technology,Faculty of Materials and Optoelectronic Physics,Xiangtan University,411105,China
2.Key Laboratory of Structure and Functional Regulation of Hybrid Materials of Ministry of Education,Institutes of Physical Science and Information Technology,Anhui University,Hefei,230601,China
3.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan,430070,China
4.Department of Materials Science and Engineering and Shenzhen Key Laboratory of Hydrogen Energy,Southern University of Science and Technology,Shenzhen,518055,China

Ji，Y.,Luo，W.,Liu，Y.,et al. Bifunctional o-CoSe2/c-CoSe2/MoSe2 heterostructures for enhanced electrocatalytic and photoelectrochemical hydrogen evolution reaction[J]. Materials Today Chemistry,2022,23.

Ji，Y..,Luo，W..,Liu，Y..,He，Z..,Cheng，N..,...&Ren，L..(2022).Bifunctional o-CoSe2/c-CoSe2/MoSe2 heterostructures for enhanced electrocatalytic and photoelectrochemical hydrogen evolution reaction.Materials Today Chemistry,23.

Ji，Y.,et al."Bifunctional o-CoSe2/c-CoSe2/MoSe2 heterostructures for enhanced electrocatalytic and photoelectrochemical hydrogen evolution reaction".Materials Today Chemistry 23(2022).