Electrode　design　plays　an　important　role　in　improving　hydrogen　evolution　reaction　(HER),　and　the　self-supporting　electrode　with　three-dimensional　(3D)　porous　structure　is　widely　adopted　in　the　electrocatalytic　hydrogen　evolution.　To　better　the　performance　of　Pt　catalyst　for　hydrogen　evolution,　a　layer　of　TiO2　nanotube　arrays　(TiO2　NTs)　fabricated　on　titanium　mesh　(3D-Ti)　or　plate　Ti　(P-Ti)　substrate,　respectively,　has　been　selected　as　support　materials　to　load　Pt　nanocluster　(Pt-x/TiO2　NTs@3D-Ti　and　Pt-x/TiO2　NTs@P-Ti)　via　an　atomic　layer　deposition　method.　It　has　been　revealed　that　one　chemical　bond　of　Ti-O-Pt　had　been　formed　between　Pt　nanocluster　and　TiO2　nanotube.　The　theoretical　calculations　confirm　that　Ti-O-Pt　bond　can　not　only　improve　the　stability　of　Pt　nanocluster　but　also　improve　its　capability　for　hydrogen　evolution.　In　addition,　the　3D-Ti　substrate　with　open　structure　can　further　better　Pt　nanoclusters＇　performance　on　hydrogen　evolution.　The　obtained　Pt-x/TiO2　NTs@3D-Ti　electrode　exhibits　an　overpotential　of　53　mV　in　0.5　M　H2SO4　at　-10　mA　cm(-2),　and　its　mass　activity　has　been　improved　by　a　factor　of　18　compared　with　Pt-x/TiO2　NTs@P-Ti.　(c)　2022　Elsevier　Ltd.　All　rights　reserved.