Sulfur‐Doped rGO Aerogel Enables the Anchoring of 1T/2H MoS₂ for Durable Oxygen Reduction Reaction Catalyst Support

Abstract

Durability is crucial for the long‐term application of cathode oxygen reduction reaction (ORR) catalysts in fuel cells. In this work, sulfur was successfully doped into reduced graphene oxide (rGO) aerogels to achieve the formation of 1T/2H hybrid phase MoS2, obtaining MoS2@S‐rGO‐300 composite ORR catalyst support. After loading ultrafine Pt nanoparticles, Pt/MoS2@S‐rGO‐300 showed not only an enhanced ORR activity, but also a significantly improved stability after 10000 cycles. The mass activity retention for Pt/MoS2@S‐rGO‐300 after cycles reached 89.94 %, while that of Pt/rGO was only 37.44 %. Density functional theory calculations revealed that the enlarged binding energy between Pt atoms and MoS2@S‐rGO‐300 led to the prevention of Pt agglomeration as well as Ostwald ripening.

ZnIn2S4 Heterojunctions Constructed with In-MOF Precursor for Photocatalytic Hydrogen Evolution without Cocatalysts

“…Conversely, the photocurrent disappeared when the light was off. ZnIn M S 4 -2 exhibited significantly highest photocurrent than ZnIn 2 S 4 and In-MOF, showing the best charge-carrier separation of ZnIn M S 4 -2 under visible light irradiation. ,, Electrochemical impedance spectroscopy (EIS) was used to test the impedance value of the photocatalysts. The radius of ZnIn M S 4 -2 in Figure e was smaller than those of ZnIn 2 S 4 and In-MOF.…”