PDF(Pubmed)
Abstract：
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 (Co2 C) through carburization of Co-based Prussian Blue Analog (Co-PBA) is reported in CO2 /H2 atmosphere under mild conditions (230 °C, ambient pressure). Textural property investigations indicate a successful preparation of orthorhombic-phased Co2 C nanomaterials with Pt-group-like electronic properties. As a demonstration, Co2 C achieves landmark photo-assisted thermal catalytic CO2 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 CO2 hydrogenation, the versatile Co2 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 Co2 C nanomaterials.
摘要：
实现纳米级过渡金属碳化物（TMC）的可扩展合成，被视为铂族贵金属的替代品，仍然是一个持续的挑战。在这里，据报道，在温和条件（230°C，环境压力)。结构性质研究表明，已成功制备了具有Pt基团样电子性质的正交晶相Co2C纳米材料。作为一个示范,Co2C实现了具有里程碑意义的光辅助热催化CO2转化率，具有光转换产物选择性，这远远超过了代表性的Pt族金属基催化剂。这一令人印象深刻的结果归因于反应物的优异活化，彩色光吸收，和光热转换能力。除了CO2加氢，多功能Co2C材料在抗菌治疗中显示出巨大的前景，界面水蒸发，电化学析氢反应，和电池技术。这项研究为释放多功能Co2C纳米材料的潜力铺平了道路。
