Ren, Ren Liu, Guicheng Kim, Ji Young Ardhi, Ryanda Enggar Anugrah Tran, Minh Xuan Yang, Woochul Lee, Joong Kee 2024-01-19T12:01:34Z 2024-01-19T12:01:34Z 2022-05-12 2022-06 0926-3373 https://pubs.kist.re.kr/handle/201004/115164 Energy level matching and structural stabilization of semiconductor electrode materials are critical for improving the efficiency and durability of bifunctional catalysts for photo-enhanced rechargeable Zn-air batteries. We developed a photoactive bifunctional air-electrocatalyst comprising n-type g-C3N4 and p-type copper-doped ZIF67 (CuZIF-67) composite. g-C3N4/CuZIF-67 exhibits wide-range solar spectrum absorption and enhanced electron-hole pairs separation efficiency owing to synergistic effects of a suitable bandgap width, staggered p-n heterojunction band gap structure, and built-in electric field at its p-n heterojunction, leading to higher oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) activities compared with single p-and n-type catalysts. It has photo-enhanced charge/discharge abilities, has a voltage gap of 0.81 V under 1-sun-illumination, and maintains stable cycling with 60% round-trip efficiency under illumination over 1000 cycles for 336 h at 2 mA cm(-2). In conclusion, staggered p-n heterojunction and pyrrolic nitrogen-rich groups are important for efficient and durable photo-enhanced Zn air batteries. English Elsevier BV Photoactive g-C3N4/CuZIF-67 bifunctional electrocatalyst with staggered p-n heterojunction for rechargeable Zn-air batteries Article 10.1016/j.apcatb.2022.121096 1 Applied Catalysis B: Environmental, v.306 Applied Catalysis B: Environmental 306 N scie scopus 000783803100004 2-s2.0-85122691235 Chemistry, Physical Engineering, Environmental Engineering, Chemical Chemistry Engineering Article METAL-ORGANIC-FRAMEWORKS OXYGEN REDUCTION Z-SCHEME PHOTOCATALYTIC ACTIVITY HYDROGEN EVOLUTION QUANTUM DOTS LONG-LIFE CARBON ZIF-67 NANOPARTICLES Photo-enhanced electrocatalyst Staggered p-n heterojunction Durability <p>ORR/OER</p> Rechargeable Zn-air battery