Ndị nchọpụta gosipụtara atụmatụ ọhụrụ maka ịkwalite ọrụ catalytic site na iji tungsten suboxide dị ka otu-atom catalyst (SAC). Atụmatụ a, nke na-eme ka mmeghachi omume hydrogen evolushọn (HER) dị na platinum metal (pt) dị ugboro 16.3 nke ukwuu, na-eme ka ìhè na mmepe nke teknụzụ electrochemical ọhụrụ.

A tụlere hydrogen dị ka ihe ọzọ na-ekwe nkwa karịa mmanụ ọkụ. Otú ọ dị, ọtụtụ n'ime usoro mmepụta hydrogen mmepụta ihe na-abịa na nsogbu gburugburu ebe obibi, na-ahapụ nnukwu carbon dioxide na gas griin haus.

A na-ahụta ikewa mmiri elektrọn dị ka ụzọ nwere ike isi mepụta hydrogen dị ọcha. Pt bụ otu n'ime ihe ndị a na-ejikarị eme ihe iji melite arụmọrụ HER na nkewa mmiri electrochemical, mana ọnụ ahịa dị elu na ụkọ nke Pt na-anọgide na-egbochi ngwa ahịa ngwa ngwa.

SAC, ebe ụdị ọla niile na-agbasasị n'otu n'otu na ihe nkwado achọrọ, ka achọpụtara dị ka otu ụzọ isi belata ọnụọgụ Pt, ebe ha na-enye ọnụ ọgụgụ kachasị elu nke atom Pt kpughere.

N'ịbụ onye sitere na ọmụmụ ihe mbụ, bụ nke lekwasịrị anya na SAC nke ihe ndị sitere na carbon na-akwado, otu nyocha KAIST nke Prọfesọ Jinwoo Lee sitere na Ngalaba Chemical na Biomolecular Engineering na-eduzi nyochara mmetụta nke ihe nkwado na arụmọrụ nke SAC.

Prọfesọ Lee na ndị na-eme nchọpụta ya tụrụ aro mesoporous tungsten suboxide dị ka ihe nkwado ọhụrụ maka Pt atomically gbasasịa, ebe a na-atụ anya na ọ ga-enye ụkpụrụ elektrọnik dị elu ma nwee mmetụta synergetic na Pt.

Ha tụnyere arụmọrụ nke otu-atom Pt nke carbon na tungsten suboxide na-akwado n'otu n'otu. Nsonaazụ gosipụtara na mmetụta nkwado ahụ mere na tungsten suboxide, nke ọrụ oke nke otu-atom Pt nke tungsten suboxide na-akwado bụ 2.1 ugboro karịa nke otu atom Pt nke carbon na-akwado, yana 16.3 ugboro dị elu karịa nke Pt. nanoparticles nke carbon na-akwado.

Ndị otu ahụ gosipụtara mgbanwe na usoro eletrọnịkị nke Pt site na ịnyefe ụgwọ site na tungsten suboxide gaa na Pt. A kọwapụtara ihe omume a n'ihi mmekọrịta siri ike metal na-akwado n'etiti Pt na tungsten suboxide.

Enwere ike imeziwanye arụmọrụ ya ọ bụghị naanị site n'ịgbanwe usoro eletrọnịkị nke igwe a na-akwado, kamakwa site n'ịkwalite mmetụta nkwado ọzọ, mmetụta spillover, otu nnyocha ahụ kọrọ. Hydrogen spillover bụ ihe omume ebe hydrogen adsorbed na-esi n'otu elu gaa n'ọzọ, ọ na-adịkwa mfe ka nha Pt na-adị ntakịrị.

Ndị nyocha ahụ tụlere arụmọrụ nke otu-atom Pt na Pt nanoparticles nke tungsten suboxide na-akwado. Otu-atom Pt nke tungsten suboxide kwadoro gosipụtara ogo dị elu nke hydrogen spillover phenomenon, nke kwalitere ọrụ Pt mass maka evolushọn hydrogen ruo ugboro 10.7 ma e jiri ya tụnyere Pt nanoparticles nke tungsten suboxide na-akwado.

Prọfesọ Lee kwuru, "Ịhọrọ ezigbo ihe nkwado dị mkpa maka ịkwalite electrocatalysis na mmepụta hydrogen. Tungsten suboxide catalyst anyị ji kwado Pt n'ọmụmụ ihe anyị na-egosi na mmekọrịta dị n'etiti ígwè na nkwado dabara nke ọma nwere ike ime ka arụmọrụ nke usoro a dịkwuo elu. "