Feng Xiaoxuan, Zhou Guangyao, Fang Linya, Pang Huan, Yang Jun, Xu Lin, Sun Dongmei, Tang Yawen
School of Chemistry and Materials Science, Jiangsu Key Laboratory of New Power Batteries, Nanjing Normal University, Nanjing, 210023, P. R. China.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225009, P. R. China.
Chemistry. 2021 Jul 7;27(38):9850-9857. doi: 10.1002/chem.202100612. Epub 2021 May 19.
The search for economical, active and stable electrocatalysts towards the hydrogen evolution reaction (HER) is highly imperative for the progression of water electrolysis technology and related sustainable energy conversion technologies. The delicate optimization of chemical composition and architectural configuration is paramount to design high-efficiency non-precious metal HER electrocatalysts. Herein, we report a one-step scalable template/solvent-free pyrolysis approach for in situ immobilizing uniform CoP nanoparticles onto N and P co-doped carbon porous nanosheets (denoted as CoP@N,P-CNSs hereafter). The simultaneous consideration of architectural design and nanocarbon hybridization renders the formed CoP@N,P-CNSs with plentiful well-dispersed anchored active sites, shortened pathway for mass diffusion, enhanced electric conductivity, and reinforced mechanical stability. As a consequence, the optimized CoP@N,P-CNSs exhibit an overpotential of 115 mV to afford a current density of 10 mA cm , small Tafel slope of 74.2 mV dec , high Faradaic efficiency of nearly 100 %, and superb long-term durability in an alkaline medium. Given the fabrication feasibility, mass production potential and outstanding HER performance, the CoP@N,P-CNSs may hold great promise for large-scale electrochemical water splitting. More importantly, the explored one-step template/solvent-free pyrolysis methodology offers a feasible and versatile route to fabricate carbon nanosheet-based nanocomposites for diverse energy conversation-related applications.
寻找经济、活性高且稳定的析氢反应（HER）电催化剂对于水电解技术及相关可持续能源转换技术的发展至关重要。化学成分和结构构型的精细优化对于设计高效非贵金属HER电催化剂至关重要。在此，我们报道了一种一步可扩展的无模板/无溶剂热解方法，用于将均匀的CoP纳米颗粒原位固定在N和P共掺杂的碳多孔纳米片上（以下简称CoP@N,P-CNSs）。同时考虑结构设计和纳米碳杂化，使得形成的CoP@N,P-CNSs具有大量分散良好的锚定活性位点、缩短的质量扩散路径、增强的电导率和增强的机械稳定性。因此，优化后的CoP@N,P-CNSs在提供10 mA cm电流密度时的过电位为115 mV，塔菲尔斜率为74.2 mV dec，法拉第效率接近100%，并且在碱性介质中具有出色的长期耐久性。鉴于其制备可行性、大规模生产潜力和出色的HER性能，CoP@N,P-CNSs在大规模电化学水分解方面可能具有巨大潜力。更重要的是，所探索的一步无模板/无溶剂热解方法为制备用于各种能量转换相关应用的碳纳米片基纳米复合材料提供了一条可行且通用的途径。
