【摘要】 在锂-二氧化碳电池中，阴极二氧化碳还原反应和宽禁带绝缘产物Li₂CO₃分解反应动力学缓慢，导致CO₂捕获困难，电池充电过电位高。为了改善反应动力学并降低反应过电位，我们合成了具有丰富拉伸应变的介孔铂纳米片。由于孔隙周围存在大量的不饱和配位铂原子，介孔铂纳米片产生了拉伸应变。这种拉伸应变在调节Pt催化表面与吸附中间体之间的相互作用中起着关键作用。并且，二维结构为催化反应提供了更多的活性位点。这些优势使锂-二氧化碳电池在电流密度为10μA·cm^-2，截止容量为100μAh·cm^-2的条件下，达到了0.36 V的极低过电位，并且具有超过2000 h的循环稳定性。本研究为合理设计用于电化学储能的应变工程金属基材料开辟了新的可能性。更多还原

【Abstract】 The slow kinetics of the cathode CO₂ reduction reaction and the decomposition reaction of Li₂CO₃, a widebandwidth insulating product, lead to difficult CO₂ capture and high charging potential in Li-CO₂ batteries. To improve the reaction kinetics and decrease the reaction overpotential, we synthesized mesoporous Pt nanosheets with high tensile strain. The presence of many unsaturated coordinated Pt atoms around the pores gives rise to tensile strain in the mesoporous Pt nanosheets. This tensile strain plays a key role in regulating the interactions between the catalytic surface of Pt and the adsorbed intermediates. The two-dimensional structure provides more active sites on the surface for the catalytic reactions. These superiorities enable a low overpotential of 0.36 V at a cutoff capacity of 100 μAh·cm^-2 at a current density of 10 μA·cm^-2 over more than 2000 h. This study opens new possibilities for the rational design of metal-based materials with strain engineering for electrochemical energy storage.更多还原