Developing cost-effective electrocatalysts with efficient activity and superior stability for hydrogen evolution reaction (HER) over a wide pH range is highly desirable and remains a significant challenge. Herein, we report CoP supported RuP₃ nanosheet (RuP₃–CoP NS) HER electrocatalysts through an ice-templating method. Constructing heterojunctions of RuP₃ and CoP can reduce the loading of scarce Ru species in the catalyst, and meanwhile, maintain efficient HER activity over a wide pH range. The RuP₃–CoP NS catalyst with only about 15 wt.% loading of Ru species exhibits remarkable HER performance with excellent catalytic stability and low overpotentials of 25, 60, and 81 mV at 10 mA/cm² in alkaline, acidic, and neutral media, respectively. The density functional theory calculations indicated that the RuP₃ could induce boosting the catalytic activity of P sites in CoP. The enhancement of the HER performance can be attributed to the electron transfer from RuP₃ to the P sites in CoP, which changes its electronic structure, and thus, optimizing the adsorption strength of H^∗.

开发具有高效活性和优异稳定性的具有成本效益的电催化剂在很宽的 pH 范围内用于析氢反应 (HER) 是非常可取的，并且仍然是一个重大挑战。在此，我们通过冰模板法报告了 CoP 支持的 RuP ₃纳米片（RuP ₃ -CoP NS）HER 电催化剂。构建 RuP ₃和 CoP 的异质结可以减少催化剂中稀有 Ru 物种的负载，同时在较宽的 pH 范围内保持高效的 HER 活性。RuP ₃ –CoP NS 催化剂只有约 15 wt.% 的 Ru 物质负载量表现出显着的 HER 性能，具有出色的催化稳定性和 25、60 和 81 mV 在 10 mA/cm ^{2 下的}低过电位分别在碱性、酸性和中性介质中。密度泛函理论计算表明，RuP ₃可以提高 CoP 中 P 位点的催化活性。HER 性能的增强可归因于电子从 RuP ₃转移到 CoP 中的 P 位点，这改变了其电子结构，从而优化了 H ^*的吸附强度。