The　development　of　efficient　and　stable　electrocatalysts　for　the　hydrogen　evolution　reaction　(HER)　is　essential　for　the　realization　of　effective　hydrogen　production　via　seawater　electrolysis.　Herein,　the　study　has　developed　a　simple　method　that　combines　electrospinning　with　subsequent　thermal　shock　technology　to　effectively　disperse　ruthenium　nanoparticles　onto　highly　conductive　titanium　carbide　nanofibers　(Ru@TiC).　The　electronic　metal-support　interactions　(EMSI)　resulted　from　charge　redistribution　at　the　interface　between　the　Ru　nanoparticles　and　the　TiC　support　can　optimize　hydrogen　desorption　kinetics　of　Ru　sites　and　induce　the　hydrogen　spillover　phenomenon,　thereby　improving hydrogen　evolution.　As　a　result,　the　Ru@TiC　catalyst　exhibits　outstanding　HER　activity,　requiring　low　overpotentials　of　only　65 mV　in　alkaline　seawater　at　the　current　density　of　100 mA　cm−2.　Meanwhile,　Ru@TiC　demonstrates　excellent　stability,　maintaining　consistent　operation　at　500 mA　cm−2　for　at　least　250　hours.　Additionally,　an　anion　exchange　membrane　electrolyzer　incorporating　Ru@TiC　operated　continuously　for　over　500　hours　at　200 mA　cm−2　in　alkaline　seawater.　This　study　highlights　the　significant　potential　of　robust　TiC　supports　in　the　fabrication　of　efficient　and　enduring　electrocatalysts　that　enhance　hydrogen　production　in　complex　seawater　environments.　©　2025　Wiley-VCH　GmbH.