Patch-like, two dimensional WSe2-based hetero-structures activated by a healing catalyst for H2 photocatalytic generation

2D photoactive materials may offer interesting opportunities in photocatalytic devices since they combine strong light absorption and shortening of charge carriers’ diffusion path. Because their high surface defect concentration the formation a majority edge/plane vs plane/plane contacts between anisotropic building blocks, passivation improvement carrier transport are critical for large development area, photo-catalysts. Here, we propose hetero-structure nanoporous network with patch-like coating as performance The hetero-structured blocks composed photo-active WSe2 nanoflake direct contact both conducting rGO nanosheet an ultrathin layer healing catalyst. resulting film achieves H2 evolution photocurrent density up to 5 mA cm−2 demonstrating that hetero-structures represent effective strategy simultaneously improve hole collection, transfer. These made catalyst promising bottom-up fabrication area photocathodes particularly photo-catalysts displaying concentration.