Ru and Se Co-Doped Cobalt Hydroxide Electrocatalyst for Efficient Hydrogen Evolution Reactions

Abstract

The development of efficient electrocatalysts for hydrogen evolution reactions is an extremely important area for the development of green and clean energy. In this work, a precursor material was successfully prepared via electrodeposition of two doping elements to construct a co-doped cobalt hydroxide electrocatalyst (Ru-Co(OH)2-Se). This approach was demonstrated to be an effective way to improve the performance of the hydrogen evolution reaction (HER). The experimental results show that the material exhibited a smaller impedance value and a larger electrochemically active surface area. In the HER process, the overpotential was only 109 mV at a current density of 10 mA/cm2. In addition, the doping of selenium and ruthenium effectively prevented the corrosion of the catalysts, with the (Ru-Co(OH)2-Se) material showing no significant reduction in the catalytic performance after 50 h. This synergistic approach through elemental co-doping demonstrated good results in the HER process.

Synthesis of Lead Dioxide and Evaluation of Its Electrocatalytic Performance in Ammonia Synthesis

“…Table 1 below summarizes the primary reaction stages corresponding to the NRR hydrogenation reaction, 23 from which it can be seen that at least 6 e − and 6 H + are required to participate in the reaction from N 2 to NH 3 . H + reduction is easier than N 2 reduction in terms of thermodynamics and kinetics, so HER and NRR are competitive reactions, 24 and the activation of N 2 and the hydrogenation rate of intermediate products in this process are proposed to be the reaction rate-determining steps.…”

Catalysis in Energy and the Environment: Opportunities and Challenges

“…Here, we aim to briefly introduce and classify these works. The majority focus on the synthesis and mechanisms of photo-/electrocatalysts [1][2][3][4][5][6][7][8][9]. Photo-/electrocatalysis technology has great potential for energy conversion and storage.…”

“…Improving the catalytic activity and stability of photo-/electrocatalysts under industrial conditions is a key problem that restricts their large-scale application. This Special Issue explores the promotion of photo-/electrocatalytic activity by means of morphology control [4], element doping [3], heterojunction construction [6][7][8], oxygen vacancy regulation [1], and optical properties [9], among others. Various approaches to the design and engineering of efficient photo-/electrocatalytic materials are presented.…”