材料科学
光电流
电催化剂
催化作用
分解水
纳米技术
太阳能燃料
半导体
化学工程
法拉第效率
光催化
电解质
电极
电化学
光电子学
有机化学
化学
工程类
物理化学
作者
Yejoon Kim,Jee Hyeon Kim,Eun-Kyu Lee,Sanseong Lee,Yoonsung Jung,Yoonsun Jang,Inhyeok Oh,Jun Beom Hwang,J. Lee,Kwanghee Lee,Hyunseob Lim,Sanghan Lee,Sanghan Lee,Sanghan Lee
标识
DOI:10.1002/adma.202507698
摘要
The sustainable management of biodiesel byproducts, nitrate (NO3 -) and glycerol, remains a critical environmental challenge, disrupting global nitrogen and carbon cycles. Addressing this issue from a materials science perspective, a bias-free photoelectrochemical (PEC) upcycling system based on the integration of functional energy materials is presented. A nickel-iron-phosphorus (Ni-Fe-P) electrocatalyst exhibits synergistic bi-functional activity for selective NO3 - reduction and glycerol oxidation, driven by the redox dynamics of Ni and Fe and electronic modulation by phosphorus incorporation. Through a metal-foil encapsulation strategy, the catalyst is integrated with organic semiconductor (OS)-based photoanodes and photocathodes, forming a highly efficient OS-based PEC system capable of stable operation under continuous solar illumination. The individual photoelectrodes demonstrate photocurrent densities of +15.7 and-14.8 mA cm-2 under AM 1.5G conditions, while exhibiting remarkable stability with over 96% of initial performance retained after 60 h. To enable bias-free solar upcycling, a dual-photoelectrode PEC configuration is constructed, delivering a high reaction current of 11.04 mA cm-2 along with >95% Faradaic efficiencies and excellent selectivity for both ammonia (NH3) and formic acid (FA) production. This work underscores the potential of materials-driven PEC platforms for selective solar chemical upcycling.
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