Although　the　combination　of　electrochemistry　and　homogeneous　catalysis　has　proven　to　be　a　powerful　strategy　for　achieving　a　diverse　array　of　novel　transformations,　some　challenges　such　as　controlling　the　diffusion　of　catalyst-related　species　and　the　instability　of　catalysts　at　electrodes　remain　to　be　overcome.　Herein,　we　review　recent　advances　in　electrochemical　homogeneous　catalysis,　focusing　on　electrochemical　noble-transition-metal　catalysis,　photoelectrochemical　catalysis,　and　electrochemical　enantioselective　catalysis.　The　topics　discussed　include:　(1)　how　the　noblemetal　catalystworks　in　the　presence　of　cathodic　hydrogen　evolution,　(2)　how　the　photocatalyst　gets　enhanced　redox　property,　and　(3)　how　the　enantioselectivity　is　regulated　in　a　catalytic　electrochemical　reaction.