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2026年10期
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Highly efficient hydrogen production via photothermal-catalytic methanol steam reforming over high-entropy metal oxides
Highly efficient hydrogen production via photothermal-catalytic methanol steam reforming over high-entropy metal oxides
摘要
Methanol steam reforming holds great promise for on-demand hydrogen production under mild condi-tions.However,the development of catalysts with high activity,effective CO suppression,and efficient solar energy utilization remains a formidable challenge.Here,we present a high-entropy oxide catalyst,CuCeZrLaCrOx,featuring a dominant La2Ce2O7 pyrochlore phase,which enables efficient hydrogen pro-duction via a synergistic photothermal mechanism under full-spectrum light irradiation.Mechanistic studies reveal that methanol steam reforming on this catalyst mainly proceeds via the formate pathway.Light irradiation plays a crucial role by modulating defect-associated electronic states,reducing the apparent activation energy,and facilitating interfacial redox processes that accelerate H2 generation.The CuCeZrLaCrOx-450 catalyst demonstrates high performance,achieving a H2 production rate of 579.8 mmol g-1 h-1 at～12 suns,with CO selectivity below 0.5％.Outdoor experiments under natural sun-light further confirm its robustness,with H2 production rates reaching up to 400 mmol h-1,maintaining over 99％selectivity for H2,and keeping CO and CH4 selectivities below 1％.This work demonstrates the potential of high-entropy oxides as tunable,self-regulating photothermal catalysts and offers new mech-anistic insights for the design of solar-driven hydrogen generation systems.
年，卷(期)：
2026, 71(10)
机标分类号：
O572.31
G434
U469.76
在线出版日期：
2026年7月23日
