하헌필 권동욱 김종식 2024-01-12T22:01:12Z 2024-01-12T22:01:12Z 2023-03-31 https://pubs.kist.re.kr/handle/201004/97578 질소산화물 환원용 촉매 Patent 2023-03-31 2019-04-12 ZL201910293444.1 201910293444.1 CC 특허 한국과학기술연구원