Regulating Pd nanosheets by W-doping for electrochemical nitrate reduction to ammonia. (15th July 2022)

• Record Type: Journal Article
• Authors: Li, Xingchuan; Zhang, Guike; Zhang, Nana; Luo, Yaojing; Shen, Peng; Li, Xiaotian; Chu, Ke
• Is Part Of: New journal of chemistry. Volume 46:Number 30(2022)
• Page Start: 14724
• Page End: 14730
• Publication Date: 2022-07-15
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/d2nj02427f
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : PdW nanosheets exhibit a high NO3 RR activity, attributed to the W-alloying-induced upshift of the d-band center of Pd to enhance the NO3 − activation and reduce the energy barriers of the NO3 RR process. Abstract : The electrochemical nitrate reduction reaction (NO3 RR) has been recently recognized as a prospective approach for green NH3 production, while developing high-efficiency catalysts to attain both high activity and selectivity is crucial for an efficient NO3 RR process. Herein, we attempt to regulate Pd nanosheets via W doping (PdW) to enhance the NO3 RR activity, and the resulting PdW with a trace W amount (4.8 at%) exhibits an NH3 yield of 2.3 mg h −1 cm −2 and a faradaic efficiency of 70.8% at −0.7 V (RHE) along with a favorable durability. Theoretical calculations reveal that surface W oxides on PdW can upshift the d-band center of Pd to result in enhanced NO3 − activation and reduced reaction energy barriers for the critical step of *NH hydrogenation to *NH2 .