Bias‐Free Solar‐To‐Hydrogen Peroxide Production Using Nanoporous BiVO4‐Based Photoanode With Atomic Layer Deposited SnO2
原子層堆積SnO2を用いたナノポーラスBiVO4系光アノードによる無バイアス太陽光駆動過酸化水素生成 (AI 翻訳)
Jinghan Wang, Jaehyun Kim, Jin Wook Yang, So Jeong Park, Taeseok Kim, Jiwoo Lee, W. Cheon, Hee Ryeong Kwon, Sang Eon Jun, Jiayue Peng, Yu Zou, M. Shokouhimehr, Seong Keun Kim, Jin Young Kim, H. Jang
🤖 gxceed AI 要約
日本語
本研究は、BiVO4光アノードにSnO2パッシベーション層とCaSnO3助触媒を組み合わせ、無バイアスでの太陽光駆動過酸化水素生成を実現した。CaSnO3/SnO2/BiVO4光アノードは90%のファラデー効率と0.838 µmol cm−2 min−1のH2O2生成速度を示し、ペロブスカイト/Siタンデム太陽電池と組み合わせることで世界最高の太陽光-化学変換効率1.12%を達成した。
English
This study develops a BiVO4 photoanode with SnO2 passivation and CaSnO3 cocatalyst for bias-free solar-to-hydrogen peroxide production. The CaSnO3/SnO2/BiVO4 photoanode achieves 90% Faradaic efficiency, 0.838 µmol cm-2 min-1 H2O2 generation, and when combined with perovskite/Si PV, yields a record solar-to-chemical conversion efficiency of 1.12%.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
本成果は再生可能エネルギー由来の化学貯蔵技術として過酸化水素生成の可能性を示す。日本における水素社会や再エネ利用拡大の文脈で、エネルギーキャリアとしての過酸化水素活用が注目される。
In the global GX context
This work advances solar fuel production by demonstrating bias-free H2O2 generation with record efficiency. In the global GX context, it highlights a pathway for storing renewable energy as liquid chemical fuel, complementing hydrogen and ammonia as energy carriers.
👥 読者別の含意
🔬研究者:Provides a materials strategy for efficient photoelectrochemical H2O2 production, relevant for researchers in solar fuels and energy storage.
🏢実務担当者:May inform development of decentralized H2O2 production systems using solar energy.
📄 Abstract（原文）
Hydrogen peroxide (H2O2) is a green oxidant with an energy density comparable to that of compressed hydrogen, making it a promising candidate for chemical energy storage. Converting renewable energy into H2O2 via the photoelectrochemical water oxidation reaction offers a sustainable pathway, yet the competing oxygen evolution reaction limits the solar‐to‐chemical conversion (SCC) efficiency. Here, we develop a BiVO4 based photoanode combined with a conformal SnO2 passivation layer. A built‐in electric field is established at the SnO2/BiVO4 heterojunction, which facilitates charge separation and promoting hole transport toward the SnO2 surface. The valence band edge of SnO2 is also thermodynamically favorable for H2O2 production. To further improve H2O2 production, a CaSnO3 cocatalyst is integrated on the photoanode, enabling enhanced reaction kinetics and selectivity toward 2e− water oxidation pathway. The resulting CaSnO3/SnO2/BiVO4 photoanode achieves an average Faradaic efficiency of 90% over wide potential range of 0.6–2.1 VRHE, with a H2O2 generation rate of 0.838 µmol cm−2 min−1 and a photocurrent density of 5.44 mA·cm−2 at 1.23 VRHE. Photoelectrochemical device composed of CaSnO3/SnO2/BiVO4 photoanode and perovskite/Si photovoltaic simultaneously produce H2O2 and H2 without applied bias, which achieving SCC efficiency of 1.12%, the highest record to date for bias‐free H2O2 production at a single photoanode.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1002/aenm.202505447first seen 2026-05-15 20:28:42
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