Pd₂₀Te₇ Nanowires as an Efficient Multifunctional Catalyst for CO₂ and O₂ Electroreduction

Discovering a multifunctional electrocatalyst that can achieve the selective electrochemical reduction of a variety of small molecules (such as CO 2 and O 2 , etc.) is a highly promising process. However, most reported Pd‐based nanomaterials can only convert one kind of small molecule. In this study, we have constructed Pd 20 Te 7 intermetallic nanowires (Pd 20 Te 7 NWs) with numerous low‐coordinated atoms, which can serve as an efficient and multifunctional catalyst for CO 2 reduction reaction (CO 2 RR) and oxygen reduction reaction (ORR). For CO 2 RR, Pd 20 Te 7 NWs can achieve CO Faraday efficiency (FE CO ) of 96.2% at the potential of −0.8 V versus RHE. For ORR, Pd 20 Te 7 NWs have selectivity for H 2 O 2 of over 90%. Moreover, at 0.2 V versus RHE, the H 2 O 2 production rate of Pd 20 Te 7 NWs can achieve 1624.2 mmol g Pd −1 h −1 , which is approximately 8.5 times that of Pd NWs. Compared with Pd NWs, the optimized electronic structure and surface morphology of Pd 20 Te 7 NWs balance the adsorption of COOH* and CO* on the catalyst during CO 2 RR and change the adsorption mode of O 2 (side‐on to end‐on) during ORR, thus promoting CO and H 2 O 2 generation during CO 2 RR and ORR, respectively. This work highlights the importance of electronic structure and surface morphology modification of metal catalysts for electrocatalytic reactions.