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近日，鄭州大學(xué)化學(xué)學(xué)院盧思宇副教授課題組在碳點(diǎn)可控制備及其復(fù)合材料研究領(lǐng)域取得新進(jìn)展。建立了一種以碳點(diǎn)為構(gòu)筑單元制備碳化聚合物點(diǎn)與納米晶雜化材料的普適方法。相關(guān)結(jié)果以“A General Route to Prepare Low-Ruthenium-Content Bimetallic Electrocatalysts for pH-Universal Hydrogen Evolution Reaction by Using Carbon Quantum Dots”為題發(fā)表在化學(xué)類頂尖期刊《Angewandte Chemie International Edition》上，第一作者為鄭州大學(xué)博士研究生劉源，通訊作者為盧思宇副教授和中科院理化所張鐵銳教授，鄭州大學(xué)為第一通訊單位。

　　氫是一種清潔的可再生能源，電催化水分解是生產(chǎn)氫氣的最理想的技術(shù)之一。碳點(diǎn)由于小尺寸限域效應(yīng)、優(yōu)異的導(dǎo)電性能和邊緣效應(yīng)，成為理想的催化劑載體。本文成功實現(xiàn)了碳點(diǎn)負(fù)載釕（Ru）基雙金屬電催化劑的可控制備，其中Ru的含量僅為5.93μg Ru cm-2。催化劑在1 M KOH、0.5 M H2SO4和1 M PBS中，達(dá)到10 mA cm-2所需的過電位分別僅為13、58和18 mV，是已報道的無鉑電催化劑中最佳的催化活性之一。該研究也是課題組在碳點(diǎn)研究領(lǐng)域上的又一突破。

　　該研究得到了國家自然科學(xué)基金、中國博士后基金、鄭州大學(xué)青年專項基金的支持。
 
　　全文鏈接： https://doi.org/10.1002/anie.201913910

Abstract

A challenging but pressing task to design and synthesize novel, efficient, and robust pH‐universal hydrogen evolution reaction (HER) electrocatalysts for scalable and sustainable hydrogen production through electrochemical water splitting. Herein, we report a facile method to prepare an efficient and robust Ru‐M (M=Ni, Mn, Cu) bimetal nanoparticle and carbon quantum dot hybrid (RuM/CQDs) for pH‐universal HER. The RuNi/CQDs catalysts exhibit outstanding HER performance at all pH levels. The unexpected low overpotentials of 13, 58, and 18?mV shown by RuNi/CQDs allow a current density of 10?mA?cm?2 in 1?m KOH, 0.5?m H2SO4, and 1?m PBS, respectively, for Ru loading at 5.93?μgRu?cm?2. This performance is among the best catalytic activities reported for any platinum‐free electrocatalyst. Theoretical studies reveal that Ni doping results in a moderate weakening of the hydrogen bonding energy of nearby surface Ru atoms, which plays a critical role in improving the HER activity.