Abstract Highly dispersed molybdenum disulfide (MoS2) nanosheets are perpendicularly grown on the phosphorus-doped carbon nitride ((C,P)3N4) nanolayers assisted with nickel and cobalt as metal-ion bridges in order to form high-quality (C,P)3N4-M (Ni2+, Co2+)-MoS2 electrocatalysts for efficient hydrogen evolution reaction (HER). Our research demonstrates that nickel and cobalt ions assisted growth could remarkably expose more active sites as a result of less layers of MoS2 and enhance the charge transfer efficiency for the well-knit and short-distance charge transfer channels between (C,P)3N4 and MoS2. In addition, P dopants make the semiconducting basal plane of carbon nitride conductive, which is critical to forming an overall fast electron transfer tunnel. Benefiting from the vertical structure and holistic charge transfer tunnels' modulation, the (C,P)3N4-M (Ni2+, Co2+)-MoS2 electrocatalysts exhibit preferable catalysis toward HER in acid medium, evidenced by the lower overpotential and smaller Rct compared to those without metal-ion bridge between them. This strategy of forging metal-ion bridges provides avenues for modifying the intrinsic catalytic activity of electrocatalysts towards HER and other energy-related processes.

中文翻译：

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桥接金属离子诱导 MoS2 的垂直生长和 (C,P)3N4-M (Ni2+, Co2+)-MoS2 电催化剂中的整体快速电子转移，以实现高效的析氢反应

摘要 高度分散的二硫化钼 (MoS2) 纳米片垂直生长在磷掺杂的氮化碳 ((C,P)3N4) 纳米层上，并辅以镍和钴作为金属离子桥，以形成高质量的 (C,P)用于高效析氢反应 (HER) 的 3N4-M (Ni2+, Co2+)-MoS2 电催化剂。我们的研究表明，镍和钴离子辅助生长可以显着地暴露更多活性位点，因为二硫化钼层数较少，并提高 (C,P)3N4 和 (C,P)3N4 和二硫化钼。此外，P 掺杂剂使氮化碳的半导体基面具有导电性，这对于形成整体快速电子转移隧道至关重要。受益于垂直结构和整体电荷转移隧道' 调制，(C,P)3N4-M (Ni2+, Co2+)-MoS2 电催化剂在酸性介质中对 HER 表现出更好的催化作用，与它们之间没有金属离子桥的那些相比，较低的过电位和较小的 Rct 证明了这一点。这种锻造金属离子桥的策略为改变电催化剂对 HER 和其他能源相关过程的内在催化活性提供了途径。