AUTHOR=Pi Zhi-Gang , Ye Hongfeng , Han Zuqi , Yu Peng , Yin Zhuoxun , Ma Xinzhi 

TITLE=Promising CoSe2-CNT composite catalyst for efficient photoelectrochemical hydrogen evolution reaction

JOURNAL=Frontiers in Materials

VOLUME=9

YEAR=2022

URL=https://www.frontiersin.org/journals/materials/articles/10.3389/fmats.2022.1005221

DOI=10.3389/fmats.2022.1005221

ISSN=2296-8016

ABSTRACT=<p>CoSe<sub>2</sub> is a typical transition metal chalcogenide and an hydrogen evolution reaction hydrogen evolution catalyst due to its efficient and inexpensive characteristics. In this work, CoSe<sub>2</sub>/CNT composite was synthesized through a one-step solvothermal method. Specifically, a current density of 10 mA cm<sup>−2</sup> can be achieved under an overpotential of 163 mV, and the Tafel slope is 69.4 mV dec<sup>−1</sup>. The reasons for these excellent performances are: 1) the abundant catalytic active sites of CoSe<sub>2</sub>; 2) the high conductivity of CNTs; and 3) the synergistic effect between CoSe<sub>2</sub> and CNTs; iv the solar irradiation excites electrons to join the reaction. This work proposes a new way to reasonably design the high-efficiency and low-cost transition metal chalcogenide hydrogen evolution catalysts.</p>