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As one of the world's most produced chemicals, ammonia(NH_3) is synthesized by Haber–Bosch process. This century-old industry nourishes billions of people and promotes social and economic development. In the meantime, 3%–5% of the world's natural gas and 1%–2% of the world's energy reserves are consumed, releasing millions of tons of carbon dioxide annually to the atmosphere. The urgency of replacing fossil fuels and mitigating climate change motivates us to progress toward more sustainable methods for N_2 reduction reaction based on clean energy. Herein, we overview the emerging advancement for sustainable N_2 fixation under mild conditions, which include electrochemical, photo-, plasma-enabled and homogeneous molecular NH_3 productions. We focus on NH_3 generation by electrocatalysts and photocatalysts. We clarify the features and progress of each kind of NH_3 synthesis process and provide promising strategies to further promote sustainable ammonia production and construct state-of-the-art catalytic systems. 相似文献
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李昂、方方两位女作家创作的杀夫题材的小说,以女性视角审视了女性的杀夫行为,揭示了中国传统的性别差异观念对女性身体的禁锢与精神的扼杀。小说中两位女性形象所处的时代和身份、性格各不相同,但表达了两位作者对同一现象的不同思考,窥视了两性之间的激烈对抗和女性的生存困境。 相似文献
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目的:设计实现基于物联网的宿舍管理系统.方法:以STM32F103ZET6芯片为核心,通过各类传感器模块实现宿舍管理系统的设计与实现.结果:指纹识别模块实现指纹解锁房门并反馈夜间未归学生数量;温湿度传感器模块和MQ-2烟雾检测器模块实现室内温湿度的实时监测和室内烟雾的自动报警;雨滴传感器模块实现下雨天的检测并自动开关窗户;数据传输器的无线连接模块实现将以上信息发送给所有舍友及宿舍管理员手机端.结论:基于物联网的宿舍管理系统可以实时获取宿舍各种环境参数和人员情况,是一个安全方便的智能化操作平台. 相似文献
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Pan Chengcheng Song Yang Jin Weixian Qin Zhenbo Song Shizhe Hu Wenbin Xia Da-Hai 《天津大学学报(英文版)》2020,26(2):135-141
The purpose of this work was to enhance the corrosion resistance of the passive film on 304 stainless steel(SS) by chemical modification in alkaline phosphate–molybdate solutions. The 304 SS was passivated in both phosphate and phosphate–molybdate mixed solutions to investigate the effect of molybdate on its corrosion resistance. The experimental results indicated that the passive film showed better corrosion resistance in Cl--containing solutions after modification in phosphate–molybdate solutions than in phosphate-only solutions. Energy-dispersive spectroscopy analyses revealed that the passive film formed in phosphate–molybdate solutions contained Mo and P after modification, which is the reason for the enhanced corrosion resistance. 相似文献
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Hongyang Huang Jinying Zhang Yifan Zhang Chengcheng Fu Jialiang Huang Yonghong Cheng Chunming Niu Xinluo Zhao Hisanori Shinohara 《国家科学评论(英文版)》2019,6(4):767
Many different phase structures have been discovered for silver iodides. The β and γ phases were found to be the most common ones at ambient conditions, while the rock-salt phase was found to be stable under pressures between 400 MPa and 11.3 GPa. Recently, the α phase was demonstrated to be stable under ambient conditions when the particle sizes were reduced to below 10 nm. However, no other phase has been reported to be stable for silver iodides under ambient conditions. Rock-salt and helix structures have been found to be stable under ambient conditions in this study. The structures have been characterized by elemental mapping, Raman scattering, and high-resolution transmission electron microscopy. The stabilities of these structures were also confirmed by molecular dynamics and density functional theory. 相似文献
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文化在国家核心竞争力中的地位日益凸显,而文化的高质量发展需要文化与科技深度融合的双重协同.一方面,文化与科技深度融合旨在全面提升文化科技创新能力,本质在于增强文化科技向社会应用的转化能力,实现文化强国 目标.另一方面,需要遵循智能化运作的逻辑,即文化与科技深度融合的双重协同需要体现客观性原则,契合文化与科技深度融合的发展走向和价值定位,凸显文化与科技深度融合的意义.文化与科技深度融合双重协同的智能化运作是一个必然的趋势,要以科技创新为抓手促进文化的发展,搭建有助于文化产业发展的数字化平台,发挥平台的基础功能,构建市场目标的产学研联盟,培养文化与科技深度融合创新的复合型人才,顺应文化与科技融合发展的智能化发展趋势. 相似文献
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本文以2011年-2020年9月的中国知网权威数据平台为依托,以"全域旅游"和"乡村"为主题词进行文献高级检索,得到文献共计1164篇,以此作为研究对象采用文献计量方法从研究层次、研究学科和基金、研究进程等方面分析其研究现状.特别是结合国内旅游院校面向服务乡村社会开展的工作实例和旅游相关学者开展的乡村旅游研究进行数据分... 相似文献
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在线评论作为网络口碑的一种,是消费者获取网上产品信息的重要途径之一,备受消费者的关注.而对于在线评论的研究,国内外学者已研究得较为成熟.但追加评论作为在线评论的一种新形式,广受消费者的青睐.基于相关学者的研究,通过对相关文献的梳理,文章从追加评论的概念、分类、研究的理论基础及追加评论对消费者购买行为的影响四个方面对追加... 相似文献
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信息管理类专业应用型人才培养的ROPT教学模式构建研究 总被引：1，自引：0，他引：1
在当前的高等教育教学改革中,有选择地在合适的专业试行"研究性实践教学",是搞好实践教学改革、培养应用型人才的重要举措,也是高等院校提高自身科研水平的需要。通过研究信息管理类专业推行研究性实践教学的必要性和可行性,采用系统分析方法中的"目标—手段分析法"探索构建该专业ROPT教学模式。 相似文献