Visible-light photocatalytic CO2 hydrogenation using surface-alloyed plasmonic AgPt nanoprisms†

EES catalysis Pub Date : 2025-04-22 DOI:10.1039/D5EY00046G

Garv Bhardwaj, Fergus McLaren, Kishan S. Menghrajani, Sanje Mahasivam, Stefan A. Maier, Murali Sastry and Akshat Tanksale

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Abstract

Development of suitable catalysts for light-driven CO₂ hydrogenation is an alluring goal in catalysis. In this study, plasmonic Ag nanoprisms were combined with Pt to make surface-alloyed nanoparticles for aqueous-phase CO₂ hydrogenation. The Pt loading favoured the product selectivity towards multi-electron C₁ products and promoted acetic acid production via C–C coupling. Increasing the reaction pressure further improved acetic acid production where the highest yield of 0.491 mmol g_cat⁻¹ was achieved at 20 bar. Within the visible-light region, the in-plane dipole resonance peak of Ag₉₁Pt₉ at 600 nm contributed the highest apparent quantum yield of 26.7%. These investigations demonstrated the significance of designer plasmonic catalysts and highlighted their photocatalytic enhancement towards CO₂ conversion.

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使用表面合金等离子体AgPt纳米棱镜的可见光催化CO2加氢

开发适合于光驱动CO2加氢的催化剂是催化领域一个诱人的目标。在本研究中，等离子体银纳米棱镜与铂结合制成表面合金纳米颗粒，用于水相CO2加氢。Pt负载有利于产物对多电子C1产物的选择性，促进了C-C偶联生成乙酸。增加反应压力进一步提高了乙酸的产率，在20 bar条件下乙酸的产率最高，为0.491 mmol gcat−1。在可见光区，Ag91Pt9在600 nm处的面内偶极共振峰贡献了最高的表观量子产率，达到26.7%。这些研究证明了设计等离子体催化剂的重要性，并强调了它们对CO2转化的光催化增强作用。

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EES catalysis

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