KANAZAWA, Japan, June 8, 2023 /PRNewswire/ — Kanazawa Suapɔn mu nhwehwɛmufoɔ bɔ amanneɛ sɛdeɛ wɔbɛtumi de tin disulfide a ɛyɛ tratraa paa adi dwuma de ama nnuru a ɛtew carbon dioxide so ntɛmntɛm. ama ɔman a wɔmfa carbon nka ho.
Carbon dioxide (CO2) a efi mfiridwuma mu ba a wɔbɛsan de adi dwuma no yɛ ade a ɛho hia wɔ adesamma hwehwɛ a egye ntɛmpɛ sɛ wobenya ɔman a ɛbɛkɔ so atra hɔ daa a carbon nnim no mu. Esiane eyi nti, mprempren wɔreyɛ electrocatalyst ahorow a ebetumi adan CO2 yiye ayɛ no nnuru afoforo a epira kɛse ho nhwehwɛmu kɛse. Nneɛma kuw bi a wonim no sɛ dade dichalcogenides a ɛwɔ afã abien (2D) no yɛ nea wɔpɛ sɛ electrocatalysts ma CO dannan, nanso saa nneɛma yi taa nso hyɛ nneyɛe a ɛne wɔn ho wɔn ho di asi ho nkuran, na ɛtew wɔn adwumayɛ so. Yasufumi Takahashi ne ne mfɛfo a wɔwɔ Kanazawa Sukuupɔn Nanobiology Science Institute (WPI-NanoLSI) ahu dade dichalcogenide a ɛwɔ afã abien a ebetumi atew CO2 so yiye ayɛ no formic acid, ɛnyɛ nea efi abɔde mu nkutoo. Bio nso, saa nkitahodi yi yɛ ntam nkitahodi. ade a efi nnuru a wɔde yɛ nneɛma mu ba.
Takahashi ne ne mfɛfo de disulfide a ɛwɔ afã abien (MoS2) ne tin disulfide (SnS2) dwumadi a ɛma nneɛma yɛ kɛse no totoo ho. Wɔn baanu nyinaa yɛ dade dichalcogenides a ɛwɔ afã abien, na nea etwa to no yɛ nea ɛyɛ anigye titiriw efisɛ wonim sɛ tin a ɛho tew yɛ ade a ɛma wɔyɛ formic acid. Electrochemical sɔhwɛ a wɔyɛe wɔ saa nnuru yi ho no kyerɛe sɛ wɔde MoS2 na ɛma hydrogen evolution reaction (HER) no yɛ ntɛmntɛm sen sɛ wɔde CO2 bɛdannan no. HER kyerɛ adeyɛ a ɛma hydrogen ba, a mfaso wɔ so bere a wɔabɔ wɔn tirim sɛ wɔbɛyɛ hydrogen pɛtro, nanso wɔ CO2 a wɔtew so ho no, ɛyɛ akansi a wɔmpɛ. Ɔkwan foforo so no, SnS2 daa dwumadi pa a ɛtew CO2 so adi na esiw HER ano. Nhwehwɛmufo no nso yɛɛ electrochemical susuw wɔ SnS2 powder a ɛdɔɔso ho na wohui sɛ ɛnyɛ adwuma kɛse wɔ catalytic reduction of CO2 mu.
Nea ɛbɛyɛ na nyansahufo no ate baabi a mmeae a ɛyɛ adwuma wɔ SnS2 mu ne nea enti a 2D ade yɛ adwuma yiye sen aduru a wɔde yɛ ade kɛse ase no, nyansahufo no de ɔkwan bi a wɔfrɛ no scanning cell electrochemical microscopy (SECCM) dii dwuma. Wɔde SECCM no di dwuma sɛ nanopipette, na ɛyɛ nanoscale meniscus-shaped electrochemical cell ma nhwehwɛmu a ɛyɛ mmerɛw wɔ soro nneyɛe wɔ nhwɛsode ahorow so. Nsusuwii ahorow no kyerɛe sɛ SnS2 krataa no ani nyinaa yɛ catalytically active, ɛnyɛ “platform” anaa “edge” nneɛma a ɛwɔ nhyehyɛe no mu no nkutoo. Eyi nso kyerɛkyerɛ nea enti a 2D SnS2 wɔ dwumadi kɛse bere a wɔde toto SnS2 a ɛdɔɔso ho no mu.
Nkontaabu ma yenya nnuru a ɛyɛ adwuma a ɛkɔ so no ho nhumu foforo. Titiriw no, wɔahu sɛ formic acid a ɛba no yɛ ɔkwan a ɛma ahoɔden yɛ ade bere a wɔde 2D SnS2 di dwuma sɛ ade a ɛma nneɛma yɛ adwuma no.
Nea Takahashi ne ne mfɛfo hui no kyerɛ anammɔn titiriw a wɔatu de ayɛ electrocatalysts a ɛwɔ afã abien a wɔde bedi dwuma wɔ electrochemical CO2 a wɔtew so dwumadie mu. Nyansahufo no fa asɛm ka sɛ: “Nea afi mu aba yi bɛma yɛanya ntease pa na wɔayɛ dade dichalcogenide electrocatalysis kwan a ɛwɔ afã abien a wɔde brɛ anyinam ahoɔden so tew carbon dioxide so ma ɛyɛ hydrocarbons, nsa, srade acid ne alkenes a enni nsunsuanso bɔne biara.
Dade dichalcogenides a ɛwɔ afã abien (2D) nkratafa (anaasɛ monolayers) yɛ MX2 type nneɛma a M yɛ dade atom, te sɛ molybdenum (Mo) anaa tin (Sn), na X yɛ chalcogen atom, te sɛ sulfur (C). Wobetumi ada nhyehyeɛ no adi sɛ X atɔm a ɛwɔ M atɔm a ɛwɔ soro, a ɛno nso wɔ X atɔm a ɛwɔ soro. Dade dichalcogenides a ɛwɔ afã abien no ka nneɛma a wɔfrɛ no afã abien (a graphene nso ka ho) kuw bi ho, a ɛkyerɛ sɛ ɛyɛ teateaa. 2D nneɛma taa wɔ honam fam su ahorow sen wɔn mfɛfo dodow (3D) no.
Wɔayɛ dade dichalcogenides a ɛwɔ afã abien no mu nhwehwɛmu wɔ wɔn electrocatalytic dwumadi wɔ hydrogen evolution reaction (HER), nnuru a ɛma hydrogen mu no ho. Nanso afei, Yasufumi Takahashi ne ne mfɛfo a wɔwɔ Kanazawa Sukuupɔn mu ahu sɛ dade a ɛwɔ afã abien dichalcogenide SnS2 no nna HER catalytic dwumadi adi; eyi yɛ agyapade a ɛho hia yiye wɔ ɔkwan a wɔfa so yɛ adwuma no mu.
Yusuke Kawabe, Yoshikazu Ito, Yuta Hori, Suresh Kukunuri, Fumiya Shiokawa, Tomohiko Nishiuchi, Samuel Chon, Kosuke Katagiri, Zeyu Xi, Chikai Lee, Yasuteru Shigeta ne Yasufumi Takahashi. Mprɛte 1T/1H-SnS2 ma anyinam ahoɔden a wɔde kɔ CO2, ACS XX, XXX–XXX (2023).
Title: Scanning nhwehwɛmu wɔ electrochemical microscopy a ɛwɔ nkwammoaa mu de sua catalytic dwumadi a SnS2 nkratafa yɛ de tew CO2 a wɔtow gu so.
Wɔhyehyɛɛ Nanobiological Institute of Kanazawa University (NanoLSI) wɔ afe 2017 mu sɛ wiase no amanaman ntam nhwehwɛmu beaeɛ a ɛdi kan MEXT nhyehyɛeɛ no fã. Dwumadi no botae ne sɛ wɔbɛhyehyɛ nhwehwɛmubea a ɛwɔ wiase nyinaa. NanoLSI de nimdeɛ a ɛho hia sen biara a ɛwɔ biological scanning probe microscopy mu ka bom no, ɛde “nanoendoscopy mfiridwuma” si hɔ ma mfoniniyɛ tẽẽ, nhwehwɛmu ne biomolecules a wɔde di dwuma de nya nhumu wɔ akwan horow a ɛhwɛ asetra mu nneɛma te sɛ yare so no ho.
Sɛ́ sukuupɔn a edi kan wɔ nhomasua a ɛkɔ akyiri wɔ Japan Po no mpoano no, Kanazawa Sukuupɔn no aboa kɛse wɔ nhomasua a ɛkɔ anim ne adesua mu nhwehwɛmu mu wɔ Japan fi bere a wɔde sii hɔ wɔ 1949. Sukuupɔn no wɔ kɔlege abiɛsa ne sukuu ahorow 17 a ɛde nteɛso ahorow te sɛ aduruyɛ, kɔmputa, ne nnipa ho adesua ma.
Sukuupɔn no wɔ Kanazawa, kurow a agye din wɔ n’abakɔsɛm ne n’amammerɛ mu, wɔ Japan Po no mpoano. Efi feudal bere so (1598-1867) no, Kanazawa anya nyansa mu anuonyam a ɛwɔ tumi. Kanazawa Sukuupɔn no mu akyekyɛ ayɛ no sukuupɔn atitiriw abien, Kakuma ne Takaramachi, na ɛwɔ asuafo bɛyɛ 10,200, a wɔn mu 600 yɛ amanaman ntam adesuafo.
Hwɛ mfitiaseɛ nsɛm no: https://www.prnewswire.com/news-releases/kanazawa-sukuupɔn-nhwehwɛmu-a-ɛma-carbon-dioxide-a-ɛtete-301846809.html