Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education, Shandong University, Jinan, 250061, P. R. China.
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, 030001, P. R. China.
Adv Sci (Weinh). 2023 Jul;10(19):e2301073. doi: 10.1002/advs.202301073. Epub 2023 Apr 24.
Achieving scalable synthesis of nanoscale transition-metal carbides (TMCs), regarded as substitutes for platinum-group noble metals, remains an ongoing challenge. Herein, a 100-g scale synthesis of single-phased cobalt carbide (Co C) through carburization of Co-based Prussian Blue Analog (Co-PBA) is reported in CO /H atmosphere under mild conditions (230 °C, ambient pressure). Textural property investigations indicate a successful preparation of orthorhombic-phased Co C nanomaterials with Pt-group-like electronic properties. As a demonstration, Co C achieves landmark photo-assisted thermal catalytic CO conversion rates with photo-switched product selectivity, which far exceeds the representative Pt-group-metal-based catalysts. This impressive result is attributed to the excellent activation of reactants, colorific light absorption, and photo-to-thermal conversion capacities. In addition to CO hydrogenation, the versatile Co C materials show huge prospects in antibacterial therapy, interfacial water evaporation, electrochemical hydrogen evolution reaction, and battery technologies. This study paves the way toward unlocking the potential of multi-functional Co C nanomaterials.
实现纳米级过渡金属碳化物（TMCs）的规模化合成，被认为是替代铂族贵金属的一种途径，这仍然是一个持续的挑战。在此，通过在 CO/H 气氛中于 230°C、常压下碳化 Co 基普鲁士蓝类似物（Co-PBA），实现了 Co C 的 100 克规模合成。结构性质研究表明，成功制备出了具有类 Pt 族电子特性的正交相 Co C 纳米材料。作为一个例证，Co C 实现了具有光开关产物选择性的地标式光辅助热催化 CO 转化速率，远远超过了代表性的基于 Pt 族金属的催化剂。这一令人印象深刻的结果归因于反应物的优异活化、多彩的光吸收以及光-热转换能力。除了 CO 加氢，多功能 Co C 材料在抗菌治疗、界面水蒸发、电化学析氢反应和电池技术方面也显示出巨大的前景。本研究为解锁多功能 Co C 纳米材料的潜力铺平了道路。
