Amorphization-Induced Cation Exchange in Indium Oxide Nanosheets for CO 2 -to-Ethanol Conversion.

Publisher: American Chemical Society Country of Publication: United States NLM ID: 101088070 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1530-6992 (Electronic) Linking ISSN: 15306984 NLM ISO Abbreviation: Nano Lett Subsets: PubMed not MEDLINE; MEDLINE

Original Publication: Washington, DC : American Chemical Society, c2001-

Cation exchange (CE) in metal oxides under mild conditions remains an imperative yet challenging goal to tailor their composition and enable practical applications. Herein, we first develop an amorphization-induced strategy to achieve room-temperature CE for universally synthesizing single-atom doped In 2 O 3 nanosheets (NSs). Density functional theory (DFT) calculations elucidate that the abundant coordination-unsaturated sites present in a-In 2 O 3 NSs are instrumental in surmounting the energy barriers of CE reactions. Empirically, a-In 2 O 3 NSs as the host materials successfully undergo exchange with unary cations (Cu ²⁺ , Co ²⁺ , Mn ²⁺ , Ni ²⁺ ), binary cations (Co ²⁺ Mn ²⁺ , Co ²⁺ Ni ²⁺ , Mn ²⁺ Ni ²⁺ ), and ternary cations (Co ²⁺ Mn ²⁺ Ni ²⁺ ). Impressively, high-loading single-atom doped (over 10 atom %) In 2 O 3 NSs were obtained. Additionally, Cu/a-In 2 O 3 NSs exhibit an excellent ethanol yield (798.7 μmol g ^-1 h ^-1 ) with a high selectivity of 99.5% for the CO 2 photoreduction. This work offers a new approach to induce CE reactions in metal oxides under mild conditions and constructs scalable single-atom doped catalysts for critical applications.

Keywords: CO2 photoreduction; amorphous structure; cation exchange; ethanol formation; metal oxides; single-atom doped catalysts

Date Created: 20231025 Latest Revision: 20231108

20231108

10.1021/acs.nanolett.3c03178

37877790