biostudies-literatureLuo GGuangdong Basic and Applied Basic Research FoundationBasic and Applied Basic Research Foundation of Guangdong ProvinceNational Natural Science Foundation of ChinaLocal Innovative and Research Teams Project of Guangdong Pearl River Talents Programe21585https://www.ebi.ac.uk/biostudies/studies/S-EPMC12948228biostudies-literatureUnknown13(12)The introduction of the photothermal effect holds significant importance for enhancing the efficiency of solar-driven photoelectrochemical energy conversion, including water splitting, CO₂ reduction, and nitrogen reduction reactions. Distinguishing and quantifying the effects of local heating to photoelectrochemical reactions, however, remains challenging. Herein, it is reported that the local thermal in photoelectrochemical reaction can be in situ measured via an optical microfiber sensor, which captures thermo-optic signals from highly sensitive modal interference. For proof-of-concept, the laser-induced graphene (LIG) electrode as a model for photoelectrochemical reaction, which has emerged as a highly promising photoelectrode material owing its excellent photothermal conversAdvanced science (Weinheim, Baden-Wurttemberg, Germany)In Situ Disentangling Local Thermal and Photoelectron Contribution in Photoelectrochemical Reactions Based on Optical Microfiber Sensors.PMC12948228621750902019BT02X105625751292024A1515011846Huang TXu BLuo GGuan BOSun LPfalseIn Situ Disentangling Local Thermal and Photoelectron Contribution in Photoelectrochemical Reactions Based on Optical Microfiber Sensors.The introduction of the photothermal effect holds significant importance for enhancing the efficiency of solar-driven photoelectrochemical energy conversion, including water splitting, CO₂ reduction, and nitrogen reduction reactions. Distinguishing and quantifying the effects of local heating to photoelectrochemical reactions, however, remains challenging. Herein, it is reported that the local thermal in photoelectrochemical reaction can be in situ measured via an optical microfiber sensor, which captures thermo-optic signals from highly sensitive modal interference. For proof-of-concept, the laser-induced graphene (LIG) electrode as a model for photoelectrochemical reaction, which has emerged as a highly promising photoelectrode material owing its excellent photothermal convers2026-01-01T00:00:00Z2026 Feb2026-07-16T22:24:12.952Z2026-07-11T03:11:57.738ZS-EPMC129482284138810010.1002/advs.202521585